Non contact fundus lens

Question 1

Classic series vs super series

Answer 1

Classic series- Practical lenses for indirect ophthalmoscopy with slit lamp.

Super series- 2nd gen lenses. Improved double aspheric design. Wider field, high mag, and small pupil capabilities.

Question 2

Working distance for classic vs super

Answer 2

Super: 4-5 mm
Classic: 7-8mm

Question 3

Image

Answer 3

Inverted and reversed aerial image between examiner and patient.

Question 4

Why would you use a red free filter

Answer 4

Enhance blood vessels/hemorrhages, retinal lesions, NFL defects, choroidal lesions.

can differentiate between choroid vs retina.
if you see a nevus and put on red free filter and now don’t see it, means it is in the choroid. If you still see it, means it is in the retina.

Question 5

When to use yellow/ND filter

Answer 5

Photophobic pts

Question 6

When to use cobalt blue filter

Answer 6

Optic nerve head drusen