BV LAB 1

Question 1

What is heteroptropia?

Answer 1

Heterotropia is a manifest deviation (strabismus) in which the foveas of both eyes are not simultaneously aligned on the object of regard.

Question 2

What is heterophoria?

Answer 2

Heterophoria is a latent deviation in which the visual axes are normally directed to the fixation object, but deviate when the eyes are dissociated.

Question 3

When is orthophoria present?

Answer 3

Orthophoria, is present when there is no deviation on dissociation.

Question 4

Why does decompensation of heterophoria occur?

Answer 4

• Uncorrected refractive error
• Accommodative anomalies
• Anisekonia
• Occupational (poor working conditions)
• Reduced fusional reserves
• Secondary to pathology
• Poor general health
• Medicine