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$The image compares the thickness of four lenses with a -8.00D prescription, showing how different refractive indices (1.74, 1.67, 1.60, 1.56) affect lens thickness, with 1.74 being the thinnest. It's part of an eyewear guide for high myopia.$

$This image provides a quick guide on choosing the appropriate refractive index for prescription lenses based on degree ranges: 1.56 for below 200, 1.60/1.67 for 200-400, 1.71 for 400-600, and 1.74 for above 600 degrees.$

$The image introduces a guide by Optician Yuanyuan on selecting the correct refractive index to avoid thick lenses for high prescriptions. It begins explaining that 1.56 is cost-effective for prescriptions below 200 degrees, and 1.60/1.67 is suitable for 200-400 degrees.$

$This image continues the guide, recommending 1.74 for prescriptions above 600 degrees. It warns that a higher refractive index isn't always better, as it can lead to lower clarity or color fringing, and introduces four factors influencing final lens thickness.$

$The image concludes the guide, encouraging users to follow the advice for slim lenses. It includes an engagement hook asking for prescription, refractive index, and frame type, and previews the next topic: the difference between cheap and expensive lenses.$

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Why your prescription lenses so thick

Lightweight lenses for high astigmatism and high prescriptions#eyesight #prescriptionglasses #glasseshacks #afforadbleprescriptionglasses #highprescriptionframes

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From my experience with high prescription glasses, the key to avoiding thick, uncomfortable lenses really lies in understanding the refractive index and frame choice together. I used to wear glasses with a -8.00D prescription, and despite spending a lot, my lenses still felt heavy and thick, causing red marks on my nose. What helped me was selecting lenses with a higher refractive index like 1.74, which are much thinner and lighter than the standard 1.56 or 1.60 lenses. However, it's important to balance this with optical quality, because sometimes higher index lenses can introduce slight distortions or color fringing. Choosing brands and designs that use aspheric or double-aspheric lens technology also made a noticeable difference—I got better clarity with slimmer edges. Frame size greatly impacts lens thickness too. Large, square frames will magnify lens edge thickness, so opting for smaller, round frames helped keep the lens profile slim. Also, providing your precise PD (pupillary distance) when ordering was crucial. An accurate PD prevents unnecessarily thick lens edges that can happen if the prescription is centered improperly. Overall, combining these factors—high refractive index, advanced lens design, small round frames, and precise PD measurements—can significantly improve both the aesthetics and comfort of high prescription glasses. I encourage anyone struggling with thick lenses to share their prescription, index, and frame info with an optician to find the best personalized solution. It’s amazing how much difference these choices can make in daily wear comfort and appearance.