Does this description fit your Hard / RGP lens patient
# Astigmatic cornea that produces irregular fluorosceine pattern
# 3 & 9 Staining problem
# Can wear spherical Hard / RGP lenses, but they are not comfortable
# No matter what Hard / RGP lens you try, it does not fit as it should do
Then why not try a P.C.L Toric Secondary and peripheral curve lens ( T.S.P Curve Lens ).
This lens has been designed to eliminate discomfort felt by the patient, which is caused by the rocking problem, a normal spherical contact lens has on a astigmatic cornea.
The lens also gives more stability than a simple spherical lens. By having a spherical optic area with toric secondary and peripheral curves the T.S.P Curve lens will eliminate 3 & 9 staining ( the lens will produce a parallel fit, demonstrated by the fluorosceine pattern similar to a spherical lens on a spherical cornea ). The optic zone shape on a T.S.P Curve lens is oval compared to a standard curve lens optic zone which is round.
The T.S.P Curve lens can be made from any of our materials available and to any base, diameter or power required.
To assist in the fitting of the T.S.P Curve lens we offer a free P.M.M.A diagnostic trial lens to the Rx of your patient or there maybe a range of T.S.P lenses from our T.S.P Diagnostic Lists, that can be dispatch to the practitioner free of charge.
To order a diagnostic lens we need to know the K reading difference between the flatter and the steeper meridians. We then suggest you use the appearance of the fluorosceine pattern and try to establish what spherical lens base gives a well balance central fit.
7.5 base fits well in the central area and the patient has a 3/10 ths difference in K readings, order a trial lens with a 7.5/7.2 K reading difference ( i.e 8.50/8.20 secondary curve ).
7.6 base fits well in the central area and the patient has a 4/10 ths difference in K readings, order a trial lens with a 7.8/7.4 K reading difference ( i.e 8.80/8.40 secondary curve ).
Diagnostic PMMA lenses made to the patients Rx are free of charge.