Toric GP Lenses | 合法醫療器材資訊網

WhenShouldIFitaToricGPLens?AGPtoriclensdesignshouldbeusedwhencornealand/orresidualastigmatismis...GPCaseGrandRoundsTroubleshootingGuide·ContactLensClinicalPocketGuide·GPLensManagementGuide.

A GP toric lens design should be used when corneal and/or residual astigmatism is present so as to compromise the fit or vision of a spherical GP or the vision of a soft lens. There are three types of designs:

Bitoric lenses are typically indicated when the corneal cylinder is ≥ 2.50D, though if limbus-limbus toricity is exhibited via topography, individuals with as little as 2D of toricity could benefit.

These designs have toric back-surface base curve radii and toric front-surface powers to optimize both the lens-to-cornea fitting relationship and the quality of vision.

These designs have similar indications as bitoric designs (i.e., high corneal astigmatism), and the back surface is identical to that of bitoric designs. However, back toric use is limited, as all back t...