Free LASIK Preoperative Assessment Questions and Answers

Question 1

Which diagnostic tool is essential for assessing corneal thickness before LASIK surgery?

Accepted Answer

Pachymeter

Answer

A pachymeter is a specialized diagnostic tool used to measure the thickness of the cornea. This measurement, known as pachymetry, is crucial before LASIK surgery because the procedure involves removing a small amount of corneal tissue to reshape the eye. Sufficient corneal thickness is necessary to ensure the eye remains stable and healthy after the surgery.

Question 2

Why is pupil size evaluated during a LASIK preoperative exam?

Accepted Answer

To assess risk of night vision problems

Answer

Pupil size is evaluated during a LASIK preoperative exam to assess the risk of potential night vision problems post-surgery, such as glare, halos, or starbursts. If a patient's pupils dilate significantly in low light, and the laser treatment zone is smaller than the dilated pupil, light entering the eye through the untreated peripheral cornea can cause these visual disturbances. This assessment helps surgeons determine candidacy and tailor treatment plans.

Question 3

What refractive error range is typically considered suitable for LASIK?

Accepted Answer

-1.00 to -12.00 D

Answer

LASIK surgery is most effective and safest within a specific range of refractive errors. While the exact range can vary slightly based on individual factors and surgeon discretion, a common suitable range for myopia (nearsightedness) is approximately -1.00 to -12.00 diopters (D). Treating outside this range may lead to less predictable outcomes or compromise corneal integrity.

Question 4

Which condition is a contraindication for LASIK surgery?

Accepted Answer

Keratoconus

Answer

Keratoconus is a progressive eye disease where the cornea thins and bulges into a cone-like shape, leading to distorted vision. It is an absolute contraindication for LASIK surgery because removing additional corneal tissue would further weaken the already compromised cornea, potentially worsening the condition and leading to severe vision loss. LASIK relies on a healthy, stable cornea.

Question 5

What is the purpose of corneal topography in a LASIK evaluation?

Accepted Answer

To map corneal curvature

Answer

Corneal topography is a vital diagnostic tool that creates a detailed, three-dimensional map of the corneal surface's curvature and elevation. This map helps identify irregularities, astigmatism, and conditions like keratoconus, which are critical for determining LASIK candidacy and planning the precise laser ablation pattern. Accurate corneal mapping ensures the laser reshapes the cornea correctly for optimal vision correction.

LASIK - Certified LASIK Eye Surgeon Practice Test

LASIK - Certified LASIK Eye Surgeon Practice Test

Free LASIK Preoperative Assessment Questions and Answers