Questions and Answers on Contact Lens Practice |
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Page 56
... curve and that of the secondary curve , al- lowing 0.2 mm for the thickness of the ad- hesive tape . Depending on how long the polishing is continued , one can obtain a light , medium , or heavy blend , or even a definite third curve ...
... curve and that of the secondary curve , al- lowing 0.2 mm for the thickness of the ad- hesive tape . Depending on how long the polishing is continued , one can obtain a light , medium , or heavy blend , or even a definite third curve ...
Page 129
... secondary curve is usually 0.8 to 0.9 mm wide , and its radius is generally 1.0 to 1.5 mm flatter than the base curve . This is determined by trial lenses to assure a light touch under the sec- ondary curve . The peripheral curve , or ...
... secondary curve is usually 0.8 to 0.9 mm wide , and its radius is generally 1.0 to 1.5 mm flatter than the base curve . This is determined by trial lenses to assure a light touch under the sec- ondary curve . The peripheral curve , or ...
Page 135
... curve radius ) SCR ( secondary curve radius ) SCW ( secondary curve width ) Power Thickness 10.0 mm ( pupil diameter +5 mm ) 8.0 mm ( lens diameter -2 mm ) 7.5 mm ( 45.00 D ) 8.5 mm ( BCR +1 mm ) 1.0 mm ( standard ) +14.00 D ( +12.00 D ...
... curve radius ) SCR ( secondary curve radius ) SCW ( secondary curve width ) Power Thickness 10.0 mm ( pupil diameter +5 mm ) 8.0 mm ( lens diameter -2 mm ) 7.5 mm ( 45.00 D ) 8.5 mm ( BCR +1 mm ) 1.0 mm ( standard ) +14.00 D ( +12.00 D ...
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