Illuminated frenzel glasses are used in detecting?
A
Nystagmus
B
Heterophoria
C
Esotropia
D
Astigmatism
High-Yield Explanation
Ans. is 'a' i.e., Nystagmus Illuminated frenzel galsses (+20 lenses) are useful for abolishing fixation and thus revealing peripheral vestibular nystagmus.