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Use a Vertex Conversion Chart or slide to calculate the contact lens power Example Spectacle Rx: +6.00 sphere Contact Lens Rx: +6.50 sphere Spectacle Rx: -10.50 sphere Contact Lens Rx: -9.37 sphere 35 36
Pocket Guide Conversion Chart. Association of Optometric Contact Lens Education.
SOFT TORIC LENSES. Before the Fit. Patients with as low as 0.75D refractive cylinder are often good candidates. If a patient has ≥ 0.75D cylinder and is wearing a spherical lens, provide them with a toric lens to compare the quality of vision.
An ideally fitting soft contact lens should show the following attributes: Comfort (>9/10) Crisp, clear and stable vision. Full corneal coverage in all gaze positions. Regular edge alignment to conjunctiva. Smooth recovery from push-up. Adequate movement for tear exchange 0.2 – 0.4mm.
• Eye care practitioners use what’s called a Vertex Conversion Chart to calculate this. Contact lens designs include optical designs that correct for a wide range of vision, including myopia (nearsightedness), hyperopia (farsightedness), astigmatism, and presbyopia (age-
Soft Specialty Lenses; Spherical GP Lenses; Calculators. ... CLMA Contact Lens Fitting Guide; Specialty CL Externships; Useful Websites; Click ‘n’ Fit; Clinical Pocket Guide; Grand Rounds Troubleshooting Guide; Find a GP Specialist; GPLI Radio; ... Vertex Conversion Chart ...
This resource consists of concise clinical pearls pertaining to spherical GP, soft toric, GP back surface and bitoric, soft and GP multifocal, orthokeratology, keratoconus, and scleral lens designs. Diopter-to-radius conversion, and vertex conversion charts are also provided.
