3.1.3: Examine fundi using direct & indirect techniques

Question 1

What are the FoV and mag of Volk lenses?

Answer 1

Digital Wide Field: FoV 124deg, Mag 0.72
Superfield: FoV 116deg, Mag 0.76
90D: FoV 89deg, Mag 0.76

Question 2

What are the different apertures for on direct ophthalmoscope?

Answer 2

Biggest aperture: external eye
Medium aperture: disc, periphery, pupil
Smallest aperture: macula - get px to look at light
Black numbers: plus
Red numbers: minus