The number of factors that play into spectacle lens quality can be overwhelming for opticians and patients alike. The number of lens technologies and materials has grown in recent years. Undoubtedly, many of your patients ask for thin lenses. Thinner lenses are often considered by patients to be more comfortable and appealing. Many dispensing opticians will immediately recommend a high index lens material to fulfill the patient’s request for thin lenses. However, refractive index should not be the first consideration in this scenario. The most important place to always start the lens recommendation is with the patient’s prescription.
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Trivex Lens Specialist Community Blog | Thin
November 2, 2015
In general terms, if the optical power of the lens with a comparable diameter is higher than -/+3,00 diopters, the index will play a significant role and impact the edge thickness for a minus lens and the center thickness for a plus lens.