Questions and Answers on Contact Lens Practice |
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Page 140
... diopter of minus , subtract 0.01 mm . 6. The bevel width has a 0.2 mm radius . Give an example of the fitting of a small lens . 1. Vertical palpebral opening : 9 mm 2. Central K readings : 44.25 / 43.75 3. Peripheral K readings ...
... diopter of minus , subtract 0.01 mm . 6. The bevel width has a 0.2 mm radius . Give an example of the fitting of a small lens . 1. Vertical palpebral opening : 9 mm 2. Central K readings : 44.25 / 43.75 3. Peripheral K readings ...
Page 228
Jack Hartstein. Appendix F. Diopters to millimeters of radius conversion table Diopters Radius Diopters Radius Diopters Radius 37.25 9.06 42.75 7.90 48.00 7.03 37.50 9.00 43.00 7.85 48.25 7.00 37.75 8.94 43.25 7.80 48.50 6.96 38.00 8.88 ...
Jack Hartstein. Appendix F. Diopters to millimeters of radius conversion table Diopters Radius Diopters Radius Diopters Radius 37.25 9.06 42.75 7.90 48.00 7.03 37.50 9.00 43.00 7.85 48.25 7.00 37.75 8.94 43.25 7.80 48.50 6.96 38.00 8.88 ...
Page 230
... diopter b . Steepest curve + or -0.12 diopter ( toric curves maximum variation , 0.06 mm , except on lenses of 0.75 diopter value or less , 0.04 mm variation ) Test : Any measuring device for radii that will hold these tolerances . B ...
... diopter b . Steepest curve + or -0.12 diopter ( toric curves maximum variation , 0.06 mm , except on lenses of 0.75 diopter value or less , 0.04 mm variation ) Test : Any measuring device for radii that will hold these tolerances . B ...
Contents
Basic considerations | 1 |
Contact lens history | 8 |
Corneaanatomy physiology and pathology | 12 |
Copyright | |
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abrasion apex aphakia aphakic base curve base curve radius Bausch & Lomb benzalkonium chloride bifocal bifocal contact blinking cataract cause center thickness central clearance concave contact lens convex cornea corneal abrasion corneal astigmatism corneal contact lenses corneal lenses corneal radius correct curve radius cylinder Describe determine diopter Discuss edema edge epithelial epithelium examination flatter flattest fluid fluorescein pattern front surface haptic hydrophilic index finger inserted keratoconus keratometer keratometer readings keratometry layer lens diameter lenses lensometer lenticular lenticular lens limbus lower lid measure ment meridian method minus mires mold myopia nasal neal normal ocular ophthalmometer optic cap palpebral pannus patient peripheral curve plastic portion position posterior surface practitioner pupil Radiuscope refraction residual astigmatism result rotation scleral contact lens secondary curve slit lamp soaking solution spectacle steeper stroma symptoms tact lens tear technique tient tion toric upper lid vertical vision wearing of contact wetting width