Is there a difference in the quality of eyeglass lenses?

The abbe value is the number of chromatic aberrations in a lens. The higher this number is, the higher the grade of vision through the lens will undoubtedly be. Due to these properties, it is the lens material of choice for children’s lenses, sports lenses, and safety lenses. Hi-index lenses can correct vision with less material, making the lens much thinner. The plastics are graded in numbers—for example, 1.50 or 1.67.

• Yet many people still feel insecure and inadequately supported by their glasses in tricky conditions – such as for example during a storm, during the night or at dawn or dusk.
• So, the bigger the refractive index of a lens material, the less lens material is required to bend light to exactly the same degree as a lens with a lower refractive index.
• Optical shops give you a huge selection of frame choices to use on so that you can determine what looks and fits best.
• Light can either pass through a lens or reflect off the surface of it.

Nowadays most quality lens plastic in made in the Far East. It is manufactured in large pieces called blanks which are round about four inches in diameter and about 50 % an inch thick.

For Eye Care Professionals

High index plastic lenses have an increased “index of refraction” than other lenses. Well, glasses bend or refract light through your lenses so that you can see. Certain lenses have a limit to just how much they are able to bend light, also to correct it, you generally needed thicker lenses (hence, the “soda bottle”

People who need a moderately strong prescription can choose 1.57 thin & light index lenses as they are thinner and lighter than standard lenses. If you wear contacts more than your glasses, but want to change it up a little, this lens can be perfect for you! The precision of digital lenses can make your prescription look just as it did in the exam room and while you’re wearing your contact lenses. Anti-reflective coatings are a great feature to add to your lenses.

The Secret Behind The Perfect Spectacle Lens Design

Through her writing, Dr. Huang enjoys educating patients on how to lead healthier and happier lives. She also has an interest in Eastern medicine practices and learning about integrative medicine. When she’s not working, Dr. Huang loves reviewing new skin care products, trying interesting food recipes, or hanging with her adopted cats.