1.67 1.74 -8 to +8 Oversize Cat Eyes Square Frame Clear Lens Glasses Women Myopia Nerd Spectacles Degree

Boxes Included : No High-Concerned Chemical : None Element Type : Basic Classic Applicable Scenarios : Casual Product Type : Regular Reading Glasses Style Type : Square Place Of Origin : China (Mainland) Model Number : Tr5009 Keden Lens Width : 5.4Cm Lens Height : 4.9Cm Coating : Hmc Frame Material : Plastic Titanium Lenses Material : MR-174 Lenses Color : Clear Gender : Women,Men,Unisex Lenses Optical Attribute : Mirror Product Code: 101yj-insysu Origin : Mainland China Certification : None Item Type : Eyewear Eyewear Type : Reading Glasses

When choosing a refractive index, you can consider the following: 1. Degree selection: For low myopia (0-300 degrees), choose lenses with a refractive index of 1.56; for moderate myopia (300-600 degrees), consider a refractive index of 1.67; for high myopia (above 600 degrees), a refractive index of 1.74 is recommended. 2. Lens thickness: The higher the refractive index, the thinner the lens, which is suitable for users who want a thinner lens edge. 3. Imaging quality: The Abbe number of high-refractive index lenses is usually low, which may increase dispersion and affect imaging quality. Therefore, clarity and thinness need to be weighed when choosing. 4. Usage scenarios: If you do not wear glasses frequently, it may be more appropriate to choose lenses with a lower refractive index.

Please Confirm Before Purchase , Don'T Buy Mistakes!! "+" Means: Magnifying Glasses/Hyperopia/Prebyopia/Farsightedness , Most Use For 40-80 Years Old "-" Means: Myopia/Short-Short/Vision Miuns , Most Use For 0-40 Years Old "0" Means: The glasses have no prescription and are mostly used for decoration It is well known that when wearing glasses for the first time, the eyes need to readjust to the new optical correction, which may cause temporary visual discomfort, such as dizziness or headaches. Over time, the body adapts to the new vision state, and the discomfort will gradually lessen or disappear.

For Example : If You Need Presbyopia +2.5 , Please Purchase +250 If You Need Myopia -1.75 , Please Buy -175