This document discusses several tests that can be used to detect suppression in patients: 1. The four dot test uses red-green glasses and a light with red, green, and white dots to see if the patient reports more than one light. 2. The Striated Lens Test uses special lenses with striations at different angles to see if the patient perceives a full X pattern of light or missing lines, indicating suppression. 3. The base-out prism test checks for suppression by placing prisms in front of one eye to see if the eyes make an adjustment to the shifted image or not. 4. The Brock string uses differently colored beads on a string to see if the patient

1. Tests of Suppression
By -Raju RATHORE
ITM UNIVERSITY RAIPUR

2. Worth Dot / Four Dot Test
The four dot test uses red-green glasses and a
flashlight or other light source with red, green,
and a single white dot filter on it. The patient
fixates on the light and reports the total
number of lights or shapes seen

4. Striated Lens Test (Bagolini Lens Test)
Striated lenses are special lenses with no power or
correct in them. Instead, these lenses have small
lines (striations) that run at 45 degrees and parallel
in one eye and 135 degrees and parallel in the other
eye. The clinician uses a penlight and asks the
patient to look directly at the light

5. patient is the projection of an X pattern of light (normal
vision) or missing lines or pieces of a line missing
(example / seen if suppression one eye or seen if
suppression the other)

6. 4 Base-out Prism Test
Prisms have numerous applications in vision care
when a small amount of prism is applied in front of
one eye, images appear to move slightly and the
eyes make a quick adjustment. However, if one eye
is suppressing, the small image movement goes
unnoticed, and the eyes will not make an
adjustment. This is very quick and helpful
suppression check for even small eye turns (called
microtropia)

8. Brock String
The Brock string is more commonly used as a
training tool, but also has some value as a
quick suppression check. The patient holds a
string with different colored beads attached to
it up to his nose. When focused on different
beads, the patient should notice the string
forms an X or V (depending on where the
beads are on the string)

10. Referemce- https://www.seevividly.com/info/Binocular_Vision/Vision_Tests/Suppression_Tests