This document discusses accommodative facility testing, which measures the eye's ability to rapidly change focus between near and far distances. The standard test uses +/- 2.0 diopter lenses mounted in a flipper frame, with the subject alternating focus between a near and far target at 40 cm. The number of complete focus changes made within one minute is recorded as the accommodative facility score. Studies show scores are typically highest between ages 18-30 years and lower in young children under 18, possibly due to differences in eye structure and time needed to focus clearly. A score below 3 cycles/minute may warrant further testing for accurate diagnosis.

3. *It is the ability to rapidly change the
refractive power of the lens to various
focus distances .
* while maintaining angle of
convergence or eliminating the
influence of convergence .
*This ability is important when changing
the fixation from near to distance and
back again .
*Clinically accommodative facility is
measure using lenses that stimulates or
inhibit accommodation .

4. *Any combination of lenses power can
be used for evolution but empirically
+_ 2.0 DS reasonable choice .
*The testing procedure uses +_ 2.0 DS
mounted in a flipper frame .
*A flipper frame is a holder with two
minuses and two plus lenses .
*The subject to focus through on pair of
lenses an object present at a distance
of 40 cm .

5. *When the object is clearly focused A
flip quickly perform to other lens pair
and the subject focuses through them .
*This is then repeated and the number
of cycle completed in one minute as
recorded accommodative facility .
*The studies show that cycle/minute is
higher at the age 18 to 30 years .
*While in young children that is under
18 year the cycle / minute rate is lower
.

6. *One reason for the lower cycle/minute in
the group as compare with the result of 18
to 30 year old may be the difference in
structural sets .
*Instead of the subject holding the flip lens
as with adult group the examiner hold in it
.
*One also have to consider possible
differences with respect to age and the
time necessary for saying clear.
*The one testing method appear reliable if
the initial rate is lower then 3
cycle/minute.

7. *For the patient who initial
cycle/minute between 3 and 8
cycle/minute extended testing may to
arrive an accurate diagnosis .