More than third of the people who wear glasses, have astigmatism
from 0,75 and above, and 27,5 % - from 0,75 to 2,0, therefore
it is no wonder toric contact lenses of frequent replacement
become more and more popular.
In the Great Britain toric
contact lens have been prescribed to 18 % of patients,
in the USA their percentage is about the same. Soft
toric contacts lenses become so popular, because provide
patients with comfort and correct astigmatism well.
However, despite of improved design of soft contacts,
they not always can provide optimum quality of sight as
one of the basic requirements of toric contact lenses
is its correct orientation to an eye and absence of rotation
(rotation) of a contact lens is at blinking.
Studies shown that only in 69,0-73,4 % of cases contact
lenses Soflens 66 (Bausch and Lomb in 57,5 % - contact
lenses Focus Toric by CIBA Vision and in 49 % - contact
lenses Acuvue Toric by
Johnson and Johnson don’t rotate in the patients
eyes.
Displacement of a contact lens from optimum position can
be considered while writing contact lens prescription.
Besides, any displacement of a contact lens reduces stability
of its position on an eye during blinking therefore visual
acuity starts "to float".
More than 45% pf people who wish to wear contact lenses
have astigmatism, so soft toric contacts can help them.
However, studies show that only 18% of patients are prescribed
toric contacts. There are two reasons for that. First,
fitting of toric contacts require special knowledge from
your eye doctor and takes longer. Second many people don’t
want to wear toric lenses because they are thicker (therefore
less comfortable) and also they cost more.
The best toric lenses currently on the market are Biomedics
toric, Proclear Compatibles toric and Acuvue toric lenses
