Magnification in Indirect ophthalmoscopy –a) Depends on power of lens usedb) Depends on refractive error of patientc) Independent of refractive error of patientd) independent of power of lens used
ac
a
ab
bc
Magnification of image in indirect ophthalmoscopy depends upon:-


Dioptric power of the convex lens
The position of the lens in relation to the eyeball
Refractive state of the eyeball


About 5 times magnification is obtained with a +13 D lens. With a stronger lens, the image will be smaller, but brighter and field of vision will be more.