Give the following prescriptions, assuming your working distance
is 2/3 metres.
a. RE: With the streak at 900 a +2.25 sphere neutralized
the reflex; with the streak at 1800 (leaving a +2.25D sphere
in place) a -2.50 D cylinder neutralized the reflex?
b. LE: With the streak at 450 a +2.00 sphere neutralizes
the reflex, with the streak at axis 1350 a -1.00 lens neutralizes