CVS QUIZZ

Which of the following is the most significant cause of accommodative dysfunction in prolonged digital device users?

• Increased ambient illumination

• Reduced blink rate

• Constant near fixation distance

• Spectral emission of blue light

The reduced blink rate during digital screen use is primarily associated with

• Decreased corneal oxygenation

• Increased tear film evaporation

• Lagophthalmos

• Decreased aqueous production

According to the American Optometric Association, the recommended maximum continuous screen time before taking a visual break is

• 10 minutes

• 20 minutes

• 30 minutes

• 40 minutes

Which of the following binocular vision findings is most commonly associated with Computer Vision Syndrome?

• Divergence excess

• Convergence insufficiency

• Accommodative infacility

• Intermittent exotropia

In patients with CVS, a higher near exophoria is commonly attributed to

• Fatigue of the lateral rectus muscles

• Reduced accommodative convergence

• Poor fusional divergence reserves

• Increased tonic convergence

Which parameter is least affected in computer vision syndrome?

• Tear film breakup time (TBUT)

• Meibomian gland function

• Pupillary light reflex latency

• Blink rate

Blue-light filtering lenses are believed to alleviate CVS symptoms primarily by

• Enhancing contrast sensitivity

• Reducing retinal phototoxicity and glare

• Improving accommodative facility

• Increasing pupillary constriction

The typical spectral peak of blue light emitted from LED screens that is implicated in digital eye strain is approximately

• 350–400 nm

• 400–450 nm

• 480–520 nm

• 520–580 nm

Which diagnostic test provides the most direct assessment of tear film instability in CVS patients?

• Schirmer’s test

• Meibography

• TBUT

• Tear osmolarity

According to research on ergonomic factors, which of the following screen positions minimizes accommodative and dry eye strain?

• Eye level or slightly above

• 10° above eye level

• 30° below eye level

• 10–20° below eye level