Certified Instrument Specialist (CIS) Practice Exam 2025 - Free CIS Practice Questions and Study Guide

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What is a viscoelastic material primarily used for in cataract surgery?

To obstruct vision

To create and maintain space in the eye

A viscoelastic material is primarily used in cataract surgery to create and maintain space in the eye, particularly in the anterior chamber. The properties of viscoelastic materials allow them to provide a protective cushion for the eye structures during surgical manipulation. They are designed to maintain their viscosity under pressure, helping to keep the eye open and stabilize the surgical site while the surgeon operates. This space is crucial for unveiling the lens to be removed and also aids in the correct positioning of intraocular lenses once the cataract is extracted.

In contrast to the other options, viscoelastic materials do not obstruct vision, they do not replace the lens of the eye, and while they may assist in lubrication to some degree, their primary role in this context is to support surgical access and maintain space rather than enhancing overall eye lubrication.

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To replace the lens of the eye

To enhance eye lubrication

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