veritas vision system Operator Manual Rev A March 2022

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This manual contains information for the VERITAS™ Vision System. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from Johnson & Johnson Surgical Vision, Inc. iPad is a trademark of Apple Inc., registered in the U.S. and other countries. ALLEGRO, DUET, MAESTRO, and SOLO are trademarks of Micro-Surgical Technology, Inc. BLUETOOTH is a trademark of Bluetooth SIG, Inc. DURACELL and COPPERTOP are trademarks of Duracell U.S. Operations, Inc. All third party trademarks are the property of their respective owners. Please note that while every effort has been made to ensure the data provided in this document are accurate, the information, figures, illustrations, tables, specifications, and schematics contained herein are subject to change without notice. Manufacturer: Johnson & Johnson Surgical Vision, Inc. 31 Technology Drive, Suite 200 Irvine, CA 92618 USA 1-877-266-4543 For order placement of consumables, new accessory items and product returns, call 1-877-266-4543 (USA and Canada). Outside of the USA and Canada, contact your local representative. All returns must be accompanied by a Returned Goods Authorization (RGA) number. For Technical Service and Support, call 1-800-511-0911 (USA and Canada). Outside of the USA and Canada, contact your local Technical Support representative. Caution: Federal law (U.S.A.) restricts this device to sale by or on order of a physician. © Johnson & Johnson Surgical Vision, Inc. 2022

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Table of Contents 1 - Introduction Introduction... 1-1 Document Conventions... 1-3 Intended Use / Indications... 1-4 Contraindications... 1-4 Undesirable Side Effects... 1-4 Intended Patient... 1-4 Intended User... 1-4 Clinical Benefits... 1-5 Essential Performance... 1-5 Performance Characteristics... 1-5 Device Description... 1-6 VERITAS Vision System Console...1-6 VERITAS Vision System Operating Modes...1-8 FUSION Fluidics System...1-9 VERITAS Vision System Components...1-9 Accessories... 1-10 WHITESTAR Technology... 1-10

2 - Warnings, Precautions, and Other Residual Risks Precautions... 2-1 Warnings... 2-4 Residual Risks... 2-8 Regulatory Symbol Definitions... 2-9 Regulatory Compliance Statements... 2-11 Federal Communications Commission (FCC) Compliance Statement... 2-11 Innovation, Science and Economic Development Canada Notice of Compliance .2-12

System Disposal... 2-12 WEEE...2-12

Toxic and Hazardous Substances... 2-12 Restriction of Hazardous Substances in Electrical and Electronic Equipment (EU RoHS)...2-12 RoHS information for China...2-12 Registration, Evaluation, Authorization and Restriction of Chemicals (EU REACh) 2-13

Packaging Information... 2-14 Serious Incident Reporting... 2-14 Instructions for Minimizing the Environmental Impact During Normal Use . . 2-14 Z370721E Rev. A i

3 - System Components Receipt and Inspection Instructions... 3-1 VERITAS Vision System Components... 3-1 Tubing Packs... 3-4 VERITAS Advanced Fluidics Tubing Pack... 3-5 VERITAS Advanced Infusion Tubing Pack... 3-6 FUSION Dual Pump Tubing Pack... 3-7

Foot Pedal... 3-8 Removing the Handle from the Advanced Linear Pedal... 3-11 Foot Pedal Operation...3-12 Foot Pedal Storage...3-13

VERITAS Heel Insert (Optional)... 3-14 Programmable IV Pole... 3-15 VERITAS Remote Control... 3-15 VERITAS Remote Control Storage... 3-17

Surgical Media Center (SMC) (Optional)... 3-17

4 - Surgery Start Up VERITAS Vision System Setup... 4-1 Front and Rear Panel Connections... 4-2 IV Pole Setup... 4-4 Handpiece Setup... 4-4 Phacoemulsification Handpiece Setup – VERITAS Swivel... 4-5 Phacoemulsification Handpiece Setup – WHITESTAR and ELLIPS FX... 4-7 Irrigation/Aspiration Handpiece Setup... 4-9 Diathermy Handpiece Setup... 4-9 Vitrectomy Cutter Setup... 4-10

Startup... 4-10 Install the Tubing Pack... 4-12 Cup Fill... 4-13 Prime/Tune... 4-14 Suggestions for Priming the Handpieces... 4-16

Verify Irrigation/Aspiration Balance... 4-17 Priming for Vitrectomy... 4-18 Selecting and Changing Mode Parameters... 4-19 System Check-out... 4-21 Phacoemulsification... 4-22 Irrigation and Aspiration... 4-22 Diathermy... 4-22 Vitrectomy... 4-23 Z370721E Rev. A ii

Pre-operative Sterilization... 4-23 End Case... 4-23 Review Case... 4-25 End Case... 4-26

System Shutdown... 4-27

5 - Surgeon Settings Select Surgeon... 5-1 Add a New Surgeon... 5-2 Delete Surgeon... 5-3 Edit a Surgeon... 5-3 Edit Surgeon Settings... 5-4 Foot Pedal Setup... 5-6 Single Linear Foot Pedal Setup... 5-7 VERITAS Foot Pedal Setup...5-15 Advanced Control Pedal Setup... 5-23 Advanced Linear Pedal Setup...5-31

Set Sound Levels... 5-39 Default Settings... 5-39

Surgeon – Assign Order... 5-41

6 - Program Settings Create a New Program... 6-1 Delete a Program... 6-4 Edit a Program Name... 6-5 Lock a Program... 6-5 Copy a Surgeon Program... 6-5 Assign Program Order... 6-6 Program Settings... 6-6 Phaco... 6-8 Irrigation and Aspiration (I/A)... 6-9 Vitrectomy (VIT)... 6-10 Diathermy (DIA)... 6-11 Advanced Infusion...6-12

Default Settings... 6-13 Phaco Power Settings... 6-19 Continuous Phaco Power... 6-20 Pulse Mode... 6-20 Short Pulse Phaco Power... 6-20 Long Pulse Phaco Power... 6-20 Low Power Pulse Phaco Power... 6-20 Z370721E Rev. A iii

High Power Pulse Phaco Power...6-21 Single Burst Phaco Power (Panel Only)...6-21 Multiple Burst Phaco Power (Panel Only)...6-21 Continuous Burst Phaco Power...6-21

WHITESTAR Technology... 6-21 FUSION Fluidics Phaco... 6-27 Occlusion Mode Settings... 6-28 Occlusion Vacuum Threshold... 6-30 Occlusion Mode Power Settings...6-31 Venting an Occlusion... 6-33 CASE Mode... 6-33 CASE One Touch... 6-35 Reflux... 6-35

7 - System Configuration Setting the Maximum IV Pole Height... 7-1 Testing the IV Pole... 7-2 Event Log... 7-3 Wireless Foot Pedal Setup... 7-4 VERITAS Foot Pedal and Advanced Linear Pedal... 7-4 Advanced Control Pedal...7-7

VERITAS Remote Control Setup... 7-9 VERITAS Remote Control Pairing... 7-9 Wireless VERITAS Remote Control Test...7-10

System Versions... 7-10 System Self Test...7-11 Language Selection... 7-12 Surgical Media Center (SMC) (Optional)... 7-13 Set System Date and Time... 7-15 Set Units of Measure for Vacuum... 7-16 Service Interval... 7-17 Import/Export Database... 7-17 Export... 7-17 Import...7-19

Backup All... 7-20 Print to File... 7-21 Restore Database... 7-21 Restore All... 7-23 Delete a Backup Database... 7-25

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8 - Symbol Definitions 9 - Care and Cleaning Cleaning and Sterilization Procedures... 9-1 Phaco Handpiece... 9-1 Irrigation/Aspiration Handpiece... 9-2 Diathermy Handpiece and Cable... 9-2 Vitrectomy Cutter... 9-2 Touchscreen Monitor Cleaning... 9-2 Materials and Cleaning Solutions... 9-2 Cleaning Process... 9-3

General Cleaning (Console, Foot Pedal, Remote Control)... 9-3

10 - Error Messages, Troubleshooting, and Diagnostics Errors... 10-1 Most Common User-Correctable Problems... 10-1 Fuse Replacement Procedure... 10-2 Battery Replacement – VERITAS Foot Pedal and Advanced Linear Pedal . . . 10-3 Battery Replacement – VERITAS Remote Control... 10-4 Charging Options for Wireless Foot Pedals... 10-4 Troubleshooting... 10-5 General...10-5 Irrigation...10-7 Aspiration... 10-8 Phacoemulsification... 10-9 Diathermy... 10-9 Vitrectomy...10-10

Status, Warning, and Error Messages... 10-10 Error Messages...10-10

11 - Warranty and Maintenance Warranty Statement... 11-1 Extended Warranty... 11-1 Maintenance... 11-1

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12 - Specifications Physical Specifications... 12-1 Environmental Specifications... 12-3 Electrical Specifications... 12-3 Electromagnetic Disturbances... 12-4 RF Wireless Technology... 12-9 Bluetooth Characteristics... 12-16 Phacoemulsification Specifications... 12-18 Irrigation and Aspiration Specifications... 12-18 Vitrectomy Specifications... 12-19 Diathermy Specifications... 12-19 Diathermy Power Graphs... 12-20 Diathermy Power versus Load Impedance... 12-23 Phaco Power Graphs... 12-24 Phaco Tip Velocity... 12-25 Bottle Height Pressure... 12-25

13 - Accessories and Parts Reordering List of Accessories with Part Numbers... 13-1

Index

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1 - Introduction • “Introduction” on page 1-1 • “Document Conventions” on page 1-3 • “Intended Use / Indications” on page 1-4 • “Contraindications” on page 1-4 • “Undesirable Side Effects” on page 1-4 • “Intended Patient” on page 1-4 • “Intended User” on page 1-4 • “Clinical Benefits” on page 1-5 • “Essential Performance” on page 1-5 • “Performance Characteristics” on page 1-5 • “Device Description” on page 1-6

Introduction The VERITAS™ Vision System is a premium cataract system with the intended use of phaco fragmentation and removal of the crystalline lens during cataract surgery. The VERITAS Vision System features technological advancements in fluidics management and ergonomic improvements for the console, foot pedal, handpiece, and remote control.

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Introduction Figure 1-1 - VERITAS Vision System (front)

1. Programmable IV Pole

3. Front Panel Connections (see Figure 4-1)

2. Tubing Pack inserted

4. Foot Loop for system repositioning

Introduction

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Introduction The VERITAS Vision System consists of the following components: 1.

Programmable IV Pole – supports hanging bottle or bag for fluid management

2. Tubing Pack – disposable to realize the fluid handling during irrigation / aspiration (see separate Instructions for Use) 3. Wireless remote control – alternative to the touchscreen monitor (see Figure 3-1) 4. Front Panel allows for the following handpiece connections: a. Phacoemulsification Handpieces (VERITAS Swivel Handpiece/WHITESTAR™ Handpiece/ELLIPS™ FX Handpiece) – to be connected with the console. Ultrasound assisted surgical instrument including connections for fluid management (see separate Instructions for Use). b. Irrigation / Aspiration Handpieces – to be connected with the console. Surgical instrument without Ultrasound assistance (see separate Instructions for Use). c. Diathermy Handpieces – to be connected with the console. Bi-polar surgical HFinstrument (see separate Instructions for Use). d. Vitrectomy cutter – to be connected with the console. Pneumatic cutter including connections for fluid management (see separate Instructions for Use). 5. Foot pedal and foot pedal cable – variants: a. VERITAS Foot Pedal b. Single Linear Pedal (SLP) c. Advanced Control Pedal (ACP) d. Advanced Linear Pedal (ALP)

Document Conventions This manual presents two types of precautionary statements: cautions and warnings. Both types of precautionary statements must be observed to ensure safe and effective operation of the VERITAS Vision System.

WARNING! Identifies conditions or practices that could result in patient injury.

CAUTION! Identifies conditions or practices that could result in damage to equipment or data loss.

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Introduction

IMPORTANT: Identifies instructions important to the proper operation of the device.

NOTE: Provides background information to clarify a particular step or procedure.

Intended Use / Indications The VERITAS Vision System is a modular ophthalmic microsurgical system that facilitates anterior segment (i.e., cataract) ophthalmic surgery. The modular design allows the users to configure the system to meet their surgical requirements.

Contraindications Any pre-existing patient condition/s that the health care provider determines to be a contraindication to cataract surgery.

Undesirable Side Effects Complications that may be associated with the VERITAS Vision System include • corneal burn • infection/inflammation • corneal edema • broken capsule

Intended Patient Adult patients with cataracts or adult patients undergoing anterior segment ophthalmic surgery (e.g., removal of the crystalline lens).

NOTE: Pregnant or nursing women were not included in the clinical trial(s) conducted.

Intended User The JJSV Phacoemulsification System is intended for use by an ophthalmologist and support staff operating under the direction of the surgeon.

Intended Use / Indications

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Introduction

Clinical Benefits Clinical benefits of the VERITAS Vision System include the following: • Rapid visual rehabilitation • Early resumption of daily activities • Minimal ocular inflammation • Minimal postoperative astigmatism • Reduced potential for ocular complications

Essential Performance The device does not have any essential performance features as defined by IEC 60601-1 or IEC 80601-2-58. There are no clinical functions where loss or degradation result in an unacceptable risk. The VERITAS Vision System defaults to a safe state in the event of disruption.

Performance Characteristics • Phacoemulsification under irrigation / aspiration • Independent irrigation / aspiration mode • Diathermy – High Frequency surgical procedure for cutting soft tissue • Vitrectomy – mechanical cutting of Vitreous tissue in the anterior eye chamber • WHITESTAR Technology – finely modulated pulses of emulsification energy, interrupted by extremely brief cooling periods • WHITESTAR ICE Technology – This pulse shaping technology modifies the standard “square” wave pulse by increasing the amplitude of the two milliseconds of the on time “kick”. This technology then sets the remaining part of the on time to the standard power setting. This results in increased control and efficiency in phacoemulsification. • Occlusion Mode Phaco – This mode regulates the vacuum rise time following an occlusion of the phaco tip, without limiting the choice of aspiration rate. The Occlusion mode phaco also regulates the ultrasound power modulation. • FUSION™ Mode – allows the user to access the settings and variables for both CASE and Occlusion mode phaco • Chamber Stabilization Environment (CASE) – an intelligent vacuum monitoring system that regulates the maximum allowable vacuum used following the occlusion of the phaco tip • 2.1 to 3.25 mm incision phaco (19GA, 20GA, 21GA) capabilities

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Clinical Benefits 1-5

Introduction • Peristaltic- and/or venturi-based aspiration • Controlling surgical parameters by supported foot pedal and wireless remote-control unit

Device Description VERITAS Vision System Console Operating room teams contributed significantly to the successful design of the system console. The solid wheel base and locking wheels make the console stable and smooth rolling. An adjustable height Mayo tray accommodates the handpieces and tubing. The VERITAS Remote Control uses standard commercially available AA batteries for easy replacement. The foot pedal can be stored on a hanging hook when not in use.

VERITAS Vision System Display (Graphic User Interface–GUI) The system graphic screen display is easy to read and easy to operate. You can see at a glance the status of the system. The screen gives you visual indication of operating modes, settings, and system status. Messages cue you through the procedure with illustrations and prompts to indicate proper connections or system selections. Information is provided to help resolve error messages.

Prime/Tune Before the start of each surgical case, the system requires that you run prime, tune or prime/ tune. The prime mode incorporates the function of clearing the tubing of air, then fills the tubing and completes the fluid aspiration check and the vacuum check. The tune mode incorporates an ultrasonic power calibration check and safety check for the attached phaco handpiece. The prime/tune mode allows the system to prime and tune the handpiece at the same time.

Dual Pump The system provides a fluid aspiration system that uses either a peristaltic (flow-based) pump or a Venturi (vacuum-based) pump system. The surgeon can use both the peristaltic pump and the Venturi pump in the Phaco, Irrigation/Aspiration (I/A), and Vitrectomy surgical modes.

Continuous Irrigation Continuous Irrigation opens the irrigation valve for a collection of balanced salt solution during a case, independent of the foot pedal or prime cycle. Continuous irrigation can be used to fill cups prior to prime/tune and is immediately available by way of the touchscreen monitor. Tap the Cont. Irr. button to open the valve and start the flow of irrigation fluid. Tap the button again to close the valve and stop the flow of irrigation fluid. Surgeon control of continuous irrigation with the foot pedal is also available. The cup fill feature can be used in place of continuous irrigation to fill a cup. The cup fill feature is only available on the Prime/ Tune screen. (See “Prime/Tune” on page 4-14 for detailed information.)

Device Description

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Introduction

Continuous Irrigation Auto-Off (Cont. Irr. Auto-Off) Continuous Irrigation Auto-Off (Cont. Irr. Auto-Off) is available in the Surgeon Settings. When this feature is enabled, continuous irrigation will automatically turn on when the foot pedal is pressed, and automatically turn off when the handpiece is removed from the anterior chamber and the foot pedal is released. The time at which continuous irrigation automatically turns off can be set per surgeon preference. Please note that when this feature is enabled, a significantly large wound leakage or air bubbles in the tubing lines may affect the continuous irrigation auto-off.

Advanced Infusion Advanced Infusion is available when the VERITAS Advanced Infusion Pack is installed and the feature is selected in the Program Settings. When this feature is enabled, pressurized air (equivalent to 30 cm of irrigation source height) is added to the irrigation source. The pressurized air is supplied by an additional tubing line that is connected to the side panel of the console during pack setup.

NOTE: Using the Advanced Infusion feature in conjunction with vitrectomy at altitudes above 5,000 feet may result in lower than expected irrigation pressure.

Programmable Operating Parameters The system is programmable through the screens on the touchscreen monitor. You can select your desired settings for each portion of the anterior surgical procedure. The instrument program memory stores up to 100 surgeon names with a maximum of 20 different setups, plus the two JJSV default settings programs-Advanced Fluidics Program and Advanced Infusion Program. This allows different users to preset their preferences, or individual users to select setups for different procedures, including a personalized initial operating mode.

MMP – Multiple Mode Programming Multiple submodes are available within the system operating modes. The multiple submodes allows you to preset your settings for specific techniques such as phaco chop or viscoelastic removal.

Programmable IV Pole The system has a programmable IV pole. You can set the programmable IV pole height parameters independently for each of the Phaco modes plus settings for I/A and vitrectomy. During surgery, the programmable IV pole height changes to the preprogrammed height when you switch modes. The automated and programmable IV pole allows adjustment of the irrigation source height to provide gravity infusion through each procedural phase. The up and down arrows on the touchscreen or the wireless VERITAS Remote Control raises or lowers the irrigation source that contains the balanced salt solution, while maintaining the sterility within the operating field. A separate up and down switch allows IV pole adjustment from the side of the system. The foot pedal can also be programmed to move the IV pole.

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Introduction

NOTE: The IV pole movement is calibrated in centimeters. When the IV pole height is set to inches, the height shown may not update immediately upon pressing the up arrow or down arrow. When using the system with the Advanced Infusion Program, the effective irrigation source height includes an extra 30 cm to the programmed IV Pole height due to pressurizing the irrigation source.

VERITAS Vision System Operating Modes The design of the system provides all the operating modes and surgical capabilities that the anterior segment surgeon or the cataract surgeon requires. These capabilities include:

Phacoemulsification (Phaco) You use the phacoemulsification mode to break up (emulsify) the nucleus of the lens. You then aspirate the nucleus of the lens from the eye through a small incision. The continuous autotuning circuitry maximizes the emulsification efficiency for each lens density, even varying densities within the same lens. The system displays phaco time in minutes and seconds. The convenient selection of linear or panel preset phaco power, in a variety of power delivery options (continuous, pulsed, burst), provides increased precision, and control. The WHITESTAR Technology allows safe removal of all lens types through small incisions with single-mode, single-instrument convenience. The WHITESTAR Technology is a patented software program proven to change the characteristics of phacoemulsification using little or no ultrasound. The WHITESTAR Technology changes the thermal properties and improves control of the lens without reducing the cutting power or changing technique or efficiency.

Irrigation/Aspiration (I/A) The Irrigation/Aspiration mode allows for controlled aspiration of cortical material from the eye, while maintaining intraocular stability, by replacing the aspirated material with a balanced salt solution. This mode gives you flexible control of each case with the independently adjustable vacuum level settings and flow rate settings. A peristaltic pump provides a predictable and stable aspiration rate. “Aspiration Rate” and “Vacuum” settings allows for complete control. Irrigation is gravity-fed.

NOTE: The vacuum units can be set to either mmHg or kPa. To set the vacuum units go to Configuration, Set Vacuum Units. You can regulate the gravity-fed irrigation by adjusting the height of the IV pole.

Vitrectomy (VIT) You use the Vitrectomy mode to remove vitreous from the eye during surgery. The system uses air pressure to drive the vitreous cutter. The wide range of user-controlled, programmable cut rates supports both anterior segment and posterior segment surgeries.

Device Description

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Introduction

Diathermy (DIA) Most surgeons use the Diathermy mode to coagulate blood vessels during the procedure and by some surgeons to “coag” the conjunctiva at the end of the procedure. An isolated output frequency allows noncontact tissue coagulation, eliminating adhesion, and traction. Also, the depth of penetration of the energy field is less than that of lower frequency units, which minimizes tissue shrinkage or charring. The gentleness of the Diathermy mode allows the surgeon to stop “bleeders” within the incision with only minimal scleral shrinkage.

CASE One Touch The One Touch button simplifies the programming of the CASE function and allows you to easily define the basic CASE settings once. You can adjust the CASE function with the CASE One Touch settings on the surgical screens. When you use these controls, the CASE functionality changes to provide enhanced control or improved efficiency to suit any particular combination of cataract density, surgical technique or personal preferences. See “CASE One Touch” on page 6-35.

FUSION Fluidics System The system has both a flow-based peristaltic pump system and a vacuum-based Venturi pump system. The patented microprocessor-based system continuously monitors and controls intraocular conditions of the flow and vacuum in the eye.

Chamber Stabilization Environment (CASE) CASE is an intelligent vacuum monitoring system that regulates the maximum allowable vacuum used following the occlusion of the phaco tip. When the phaco tip becomes occluded, the vacuum rises. Clearing of the occlusion while the vacuum is at a high-level can lead to a post occlusion surge. When CASE is on, the system monitors the actual vacuum levels. When the vacuum exceeds a specific threshold for a specified duration, the system automatically adjusts the maximum allowable vacuum setting to a lower predefined CASE maximum vacuum level. When the occlusion clears, the system automatically restores the settings to the original programmed maximum vacuum setting. This function makes it possible to have a different maximum vacuum setting when the tip occludes than when the tip is unoccluded.

VERITAS Vision System Components VERITAS Remote Control The surgery can be controlled from the wireless VERITAS Remote Control keypad. You can access all surgical modes and adjust all surgical settings with the use of the wireless VERITAS Remote Control.

Foot Pedal The foot pedal controls the various operating modes of the instrument. You can program the foot pedal settings through the user interface. You can use either the VERITAS Foot Pedal, Single Linear Foot Pedal, Advanced Control Pedal, or the Advanced Linear Pedal with the system. Z370721E Rev. A

Device Description 1-9

Introduction The foot pedal design offers control through the use of increased linearity with the foot pedal movement. The design provides uniform pressure throughout the foot pedal movement, easing foot and leg fatigue. You can select the degrees of movement for each foot pedal position. You can save the settings for each surgeon/mode, pitch for the VERITAS Foot Pedal, Single Linear Foot Pedal, and the Advanced Linear Pedal, and pitch and yaw for the Advanced Control Pedal giving the pedal dual linear functionality. Programmable switches can activate reflux, giving an immediate response.

Accessories VERITAS Swivel Handpiece The VERITAS Swivel phaco handpiece (Figure 1-2) is the next generation handpiece from JJSV. Its front metal housing is able to rotate independently of its rear housing that is connected to the tubing and cable, thus reducing surgeon hand fatigue. The VERITAS Swivel phaco handpiece provides both longitudinal and transversal movement. You can use the handpiece with a straight tip or a curved tip. The handpiece is lightweight, slim, and easy to clean and sterilize with conventional steam autoclave methods. Figure 1-2 - VERITAS Swivel Handpiece

WHITESTAR Handpiece The design of the WHITESTAR phaco handpiece has a straight-through aspiration channel for more efficient removal of nuclear fragments, to minimize clogging and to facilitate cleaning. The handpiece is lightweight, slim, and well-balanced, making it comfortable to use and easy to control.

ELLIPS FX Handpiece The ELLIPS FX phaco handpiece is available for use with the VERITAS Vision System. The ELLIPS FX handpiece provides both longitudinal and transversal movement. You can use the handpiece with a straight tip or a curved tip.

WHITESTAR Technology The VERITAS Vision System incorporates WHITESTAR Technology to deliver finely modulated pulses of energy, interrupted by extremely brief cooling periods. This allows the Device Description

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