CPO CPO Basic Science 3

Question 1

A patient with Duane's Retraction Syndrome Type I would most likely exhibit which primary sign during an ocular motility test?

Accepted Answer

Limited abduction (outward movement)

Answer

Limited adduction (inward movement)

Answer

Limited elevation (upward movement)

Answer

Globe protrusion on adduction

Question 2

A patient experiences a severe chemical burn from an alkali substance like sodium hydroxide. The deep and rapid penetration of the chemical into the ocular tissue is primarily due to which chemical process?

Accepted Answer

Saponification

Answer

Coagulation

Answer

Precipitation

Answer

Oxidation

Question 3

Which of the following conditions is defined by a splitting of the retinal layers, particularly the neurosensory retina, rather than a separation of the retina from the underlying retinal pigment epithelium (RPE)?

Accepted Answer

Retinoschisis

Answer

Choroidal neovascularization

Answer

Rhegmatogenous retinal detachment

Answer

Epiretinal membrane

Question 4

A patient who has had cataract surgery on only one eye complains of headaches and spatial distortion, stating that objects look larger to them through the operated eye. This binocular vision problem, caused by a difference in perceived image size between the two eyes, is known as:

Accepted Answer

Aniseikonia

Answer

Anisometropia

Answer

Anisocoria

Answer

Anisophoria

Question 5

A patient with advanced keratoconus experiences significant visual distortion, including monocular diplopia and ghosting of images. This is primarily a result of:

Accepted Answer

Higher-order aberrations from an irregular corneal surface

Answer

Increased intraocular pressure

Answer

Opacification of the crystalline lens

Answer

Thinning of the retinal nerve fiber layer

Question 6

Using Prentice's Rule, calculate the amount of vertical prism induced if a patient looks 8 mm below the optical center of a lens with a power of -5.00 D in the 90-degree meridian.

Accepted Answer

4.0 Δ Base Up

Answer

4.0 Δ Base Down

Answer

0.62 Δ Base Up

Answer

0.62 Δ Base Down