Visual Acuity

Visual acuity can be assessed with.....................................

• Autorefractometer

• Opthalmoscope

• Snellens chart

• Goniometer

In testing visual acuity if the patient is unable to identify any letters on the snellens chart you should next test for the ability to:

• a. Count fingers 

• b. Identify direction of hand movements

• c. Identify position of a stationary light

• d. Identify presence of a stationary light

Use/s of Visual Acuity

• Visual Function

• Refractive status

• Outcome measure of treatment

• All of these

Visual Perception is Complex Integration of

• Light sense

• Color sense

• Contrast sense

• All of these

Minimum visible spatial threshold level depends upon specification of

stimulus-

• size

• shape

• illumination

• All of these

Ability to determine whether or not two parallel and straight lines are aligned in the frontal plane..........................

• Visual Acuity

• Dynamic Visual Acuity

• Vernier Acuity

• None of these

Stimulus Related Factor/s affecting Visual Acuity includes:- Luminance of test object, Contrast Of the stimulus etc. and .............................is not related to stimulus related.

• Wavelength of stimulus of light

• Exposure Duration

• Accommodation

• None of these

Observer Related Factor which affects visual acuity Include

• Pupil size

• Accommodation

• Optical elements of the eye

• All of these

When assessing the eyes, OD ____________ refers to which of the following?

• Right

• Left

• Both

• Neither

For the Snellen eye Chart Test results ______when the larger the denominator

• The poorer the vision

• The better the Vision