Test on Contact Lens Fitting and Management

Question 1: Vogt's striae are considered a clinical sign often present in cases of irregular astigmatism.

A. Ano

B. Ne

Explanation: The study materials explicitly state under 'Irregular astigmatism': 'SLE: Vogt’s striae, Fleischer's ring, corneal thinning'.

Question 2: Which of the following is an advantage of diagnostic contact lens fitting?

A. Less chair time (initially)

B. Minimize lens contamination

C. Confidence in fitting relationship

D. Fewer reorders

Explanation: Diagnostic fitting offers advantages such as confidence in the fitting relationship, fewer reorders, and better patient compliance. Less chair time initially and minimizing lens contamination are listed as advantages of empirical fitting.

Question 3: When fitting GP lenses, a steep fit is characterized by central bearing or touch with peripheral pooling.

A. Ano

B. Ne

Explanation: A steep fit for GP lenses is characterized by central pooling or clearance and minimal edge clearance, not central bearing or touch with peripheral pooling. Central bearing or touch with peripheral pooling indicates a flat fit.

Question 4: Which of the following are essential components of a preliminary ocular health evaluation for contact lens wear, according to the provided study materials?

A. Evaluation of corneal edema and neovascularization

B. Assessment of lens magnification using RSM

C. Tear film evaluation including Schirmer Tear Test and Rose Bengal

D. Selection of a steeper than K base curve for positive lenses

Explanation: The study materials list 'Ocular Health' under 'Preliminary Evaluation', which includes evaluating the 'Cornea' for conditions like Edema and Neovascularization, and 'Tear Film Evaluation' which includes 'Schirmer Tear Test' and 'Tear Meniscus Evaluation - Rose Bengal'. Assessment of lens magnification and base curve selection are parts of other evaluations, not preliminary ocular health.

Question 5: Corneal topography cannot localize the cone apex in keratoconus when observing a color coded map.

A. Ano

B. Ne

Explanation: Corneal topography can localize the cone apex and the localized area of steepening when observing a color coded map, which is essential for diagnosing keratoconus.