Is a High Refractive Index Harmful to the Eyes?

High refractive index is harmful to the eyes. If you wear glasses with high refractive index, it is easy to cause a series of adverse reactions, and the degree of the eyes will further deepen. Therefore, you must pay attention to go to the regular hospital ophthalmology department when fitting glasses. Pay attention to protecting your eyes, avoid excessive use of eyes, do not use electronic products for a long time, including mobile phones, computers, etc., and try to avoid sleeping on the table. The higher the refractive index, the lower the Abbe value. Abbe value is a color coefficient, usually the lower the Abbe value, the worse the imaging quality. The normal lens fitting requirements require the Abbe value to be less than 30. If the Abbe value is too low, that is, the refractive index is too high, it will lead to a decrease in the patient's visual quality and make the eye imaging unclear. In the process of fitting glasses clinically, the balance between refractive index and myopia degree will be considered when choosing the lens, because it is hoped that the lens can make the patient achieve the ideal refractive state, and the balance between the refractive index and the Abbe value and the lens degree will be considered. How to choose the refractive index of myopia glasses? Generally, for myopia glasses below 400°, a refractive index of 1.56 can be selected. Because the Abbe value is higher, the imaging quality is better, and patients wear more comfortably. For patients with high myopia, if 1.56 lenses are selected, they may be thicker. Usually, patients are recommended to choose lenses with a higher refractive index of 1.74 to reduce the weight of wearing glasses. Although the Abbe value is lower, it can reduce the weight of glasses, and the imaging quality is still acceptable.