Impact of High Myopia and Hyperopia on Lenses
When lenses are thick and heavy, they put pressure on the face, and users may feel tired after prolonged use.
Myopic lenses have thick edges, while hyperopic lenses are convex in the center. Therefore, these lenses do not look aesthetically pleasing.
With strong prescription lenses, the wearer’s facial contours may appear sunken or swollen, which is also undesirable.
Relationship Between Index and Thickness
The higher the refractive index of the material, the stronger its light-bending power. Based on this principle, the lens thickness can be reduced even if the power remains the same.