Non-active ophthalmic products, such as contact lenses and intraocular lenses, generally take the improvement of vision as the efficacy indicator in clinical trials. At present the standard logarithmic visual acuity chart is actually more used in clinical practice in China. Is this visual acuity chart recognized?

Many kinds of visual acuity charts are used in clinical ophthalmology in China. At present, LogMAR visual acuity chart is recommended in clinical trials for non-active ophthalmic products, such as corneal contact lenses and intraocular lenses, while standard logarithmic visual acuity chart can be acceptable either.

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