w2 ophthalmoscopy: field of magnification Flashcards
(9 cards)
1
Q
magnification equals…
A
M = β/α magnification = angle size of object thru opthalmoscope/ angle size of object at leat distance of distant vision
2
Q
Mag when we know dioptric length of eye =
A
M = Fe/4
3
Q
Magnification with direct ophthalmoscope equation
A
M = Fe/4 x 1/1-wK w= working distance K= ocular refraction
4
Q
mag For an emmetrope
A
M = x15
5
Q
mag For a myope
A
M = > x15
6
Q
mag For a hyperope
A
M = < x15
7
Q
field of view eqn?? and what should the aswer be in??
A
j = g(K-W)/Fe g=pupil size K=ocular refraction W = reciprocal of wd Fe = dioptric power answer should be converted to mm
8
Q
wd is always…….
A
-ve
9
Q
A
