Certified Ophthalmic Assistant Practice Exam

What type of fixation might intraocular lenses utilize?

1. Superficial and commissural

2. Posterior and anterior

3. Anterior and posterior

4. Edge and center

The correct answer is: Anterior and posterior

Intraocular lenses (IOLs) are designed to replace the eye's natural lens after cataract surgery or for other vision correction procedures. The fixation of IOLs typically involves positioning them securely within the eye, which can be described in terms of their placement relative to the anterior (front) and posterior (back) segments of the eye. The correct option highlights the fact that IOLs can be anchored in such a way that they have points of fixation in both the anterior chamber and the posterior segment of the eye. This dual fixation helps ensure the stability and proper alignment of the lens in the eye, allowing it to function effectively for vision correction. In practice, this means that depending on the type of IOL and surgical technique used, the lens can be positioned either in front of or behind the iris, but all while maintaining a secure hold. Other options might refer to different types of fixation methods not typically associated with the standard procedures for IOL placement. For example, "superficial and commissural," or "edge and center" do not accurately describe the anatomy and the typical positioning relative to the lenses in ocular procedures. Therefore, understanding the anterior and posterior fixation of IOLs is crucial for ensuring optimal outcomes following catar