Principle
Bagolini striated glasses are glasses of no dioptric power
that have many narrow striations running parallel in one meridian. These
glasses cause the fixation light to appear as an elongated streak perpendicular
to the striations.
Bagolini
Striated Glasses
The lenses are usually placed at 135o in front of the one eye and at 45o in front of the other.
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| Fig:- Bagolini Striated glasses |
This test is used to determine the direction of a
pseudofovea, abnormal retinal correspondence (ARC), suppression and diplopia
Required
Equipment
• Bagolini
Striated Glasses
• Pen
torch and a distant light source.
Procedure
and Interpretation
The Test is performed under dim lighting conditions.
If Patient have refractive correction(glasses), ask him to
wear it.
Place Bagolini Striated glasses infront of patient’s eye
The examiner shines a torch light, directing it towards the
centre bridge of the Bagolini glasses i.e. the patient’s nose .
The patient is asked to describe or draw what they have
seen, the clinician can prompt them by asking:
• How
many lights do you see
• How
many lines do you see
• Do
the lines cross
• Are
the two lines seen at the same time
• Do
the lines intersect through the light
• Do
the lines have any gaps in them
• Which
line is on the right/left (or which line is higher/lower)
Interpreting
Results
a.)
A patient with constant tropia having NRC with
no suppression will experience diplopia
a.) According to the deviation, they will be seen either in crossed or in uncrossed diplopia
a.) b.) Suppression of one eye.
In this case Left eye suppression.
a.) c.) Two steaks, but only one crossing through the
center of light, the other one being displaced away from the light with a
portion of it missing, indicate a suppression area
In this case, Right Eye has central suppression
d.) Harmonious anomalous retinal correspondence (ARC)
will see a perfect cross, as seen by a normal person
Bagolini video link is given below.....
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