Determining appropriate cylinder correction with soft toric lenses.
Several authors have advocated reducing cylinder power when fitting soft toric lenses. One rationale for this reduction is the formation of a tear lens due to incomplete flexure. Using toric lenses of various thickness (0.06-0.14 mm), I was unable to demonstrate the existence of a tear lens under thin or standard thickness Hydron toric lenses. In the absence of such a tear lens, it seems reasonable to use the same cylinder power in a soft toric lens as would be used if prescribing spectacles.
Gundel
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D000293:Adolescent; D000328:Adult; D003263:Contact Lenses, Hydrophilic; D005260:Female; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D008297:Male; D008875:Middle Aged; D011092:Polyethylene Glycols; D013666:Tears / Q000502:physiology*
D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D011092:Polyethylene Glycols