CLINICAL PROCEDURES Flashcards
(42 cards)
To measure the clarity of vision or the ability of the visual system to resolve detail
Visual Acuity
Testing distance for distance VA
20ft
Distance used for near VA
40cm
To determine if a decrease in vision is correctable by lenses
Pinhole VA
To determine if a decrease in vision is correctable by lenses
Pinhole VA
Equipment used to test VA
Projector with VA slide
Near point VA card
Occluder
Lamp
Projector or computer-generated charts
This procedure measures in diopters a patients ability to change the focus of the eye’s crystalline lens in response to near stimulus
Amplitude of Accommodation
To screen for acquired and hereditary color vision defects
Color Vision
Testing distance for Color Vision test
75cm
To assess the presence and absence of a phoria or a strabismus. Assess the presence or absence of motor fusion.
Cover test
To measure a patient’s fine depth perception through his ability to fuse stereoscopic targets
Stereopsis
Testing distance for stereopsis test
40cm
Equipment used in stereopsis test
Polaroid glasses or red-green glasses
Stereo test booklet
To assess the patient’s flat fusion ability at distance and at near
Worth 4 Dot Test
In worth 4 dot, if patient sees 2 red dots, it means
Suppressing OS
In worth 4 dot, if patient sees 3 green dots, it means
Suppressing OD
To determine the patients ability to converge the eyes while maintaining fusion
Near point of convergence
To determine the approximate positions of the visual axes of the two eyes under binocular conditions at near
Hirschberg test and krimsky test
Testing distance for Hirschberg and krimsky test
50 to 100cm
Corneal reflex at the center of the pupil
Zero angle lambda
Corneal reflex slightly nasal to the center of the pupil
Positive angle lambda
Corneal reflex slightly temporal to the center of the pupil
Negative angle lambda
To assess the patients ability to perform conjugate eye movement
EOM Test
Testing distance for EOM Test
30-40cm
