Lens Thickness Calculator

FAQs

The thickness of lenses is determined by various factors such as the prescription, lens material, and index of refraction. There is no single formula for lens thickness, as it depends on these variables.

2. What is the difference between 1.6 and 1.67 lens thickness? The difference between 1.6 and 1.67 lens thickness is that 1.67 lenses are generally thinner than 1.6 lenses for the same prescription. The higher the index of refraction, the thinner the lenses can be for a given prescription.

3. How much thinner are 1.74 lenses? 1.74 lenses are significantly thinner than lower index lenses. They can be up to 50% thinner than standard plastic lenses and provide a more aesthetically appealing and lightweight option.

4. Is there a formula for thickness? There is no single formula for lens thickness. The lens thickness is influenced by the lens material, prescription, and the chosen frame style.

5. How thick should my lenses be? The ideal lens thickness depends on your prescription and personal preferences. Thinner lenses are often preferred for higher prescriptions to provide a more cosmetically appealing and comfortable fit.

6. What is better, 1.67 or 1.74 for? 1.74 lenses are generally considered the thinnest and provide the most significant reduction in thickness compared to lower index lenses. They are suitable for higher prescriptions where thinner lenses are desired.

7. Should I get 1.61 or 1.67 lenses? The choice between 1.61 and 1.67 lenses depends on your prescription, budget, and personal preference. 1.67 lenses are generally thinner than 1.61 lenses, but they may also be more expensive.

8. Are 1.74 lenses the thinnest? Yes, 1.74 lenses are currently considered the thinnest lens option available for eyeglasses. They provide maximum thinness and are suitable for higher prescriptions.

9. Will 1.74 high index lenses make my eyes look bigger? No, the thickness or thinness of the lenses does not affect the appearance or size of your eyes. The primary purpose of high index lenses is to reduce the overall lens thickness and weight.

10. Are extra thin lenses worth it? Extra thin lenses, such as high index lenses, are worth considering for higher prescriptions as they provide a thinner and more aesthetically pleasing appearance. However, the choice ultimately depends on your personal preference and budget.

11. How do I get the thinnest lenses for my prescription? To get the thinnest lenses for your prescription, consider using high index lenses with the highest index of refraction available. Additionally, choosing a suitable frame style that minimizes the edge thickness can also contribute to thinner lenses.

12. What is the rule of thickness? The rule of thickness refers to the relationship between lens thickness and prescription. Generally, higher prescriptions require thicker lenses, while lower prescriptions result in thinner lenses.

13. What is the most accurate way to measure thickness? The most accurate way to measure lens thickness is to use specialized optical equipment like a lensometer or a digital caliper designed for precise measurements.

14. Is width and thickness the same? No, width and thickness are not the same. Width refers to the horizontal dimension of the lenses, while thickness refers to the depth or vertical dimension of the lenses.

15. Can the lenses be too thick for glasses? Yes, lenses can be too thick for glasses, especially in cases of high prescriptions. Excessively thick lenses can impact the appearance, comfort, and fit of the glasses.

16. Do lenses get thicker with prescription? Yes, lenses generally get thicker with higher prescriptions. The higher the prescription, the more curvature is required, resulting in thicker lenses.

17. What is the standard thickness of glasses? The standard thickness of glasses varies depending on the prescription, lens material, and frame style. There is no fixed standard thickness for all glasses.

18. Who should get 1.74 high index lenses? 1.74 high index lenses are suitable for individuals with higher prescriptions who desire thinner and lighter lenses. They are often recommended for prescriptions above a certain threshold to provide the best balance of aesthetics and optical performance.

19. Is 1.67 the thinnest lens? No, 1.67 lenses are thinner than standard plastic lenses but not the thinnest available. Higher index lenses such as 1.74 provide greater thinness.

20. How thick is a 1.74 lens? The thickness of a 1.74 lens depends on the prescription and other factors. Generally, 1.74 lenses are significantly thinner than lower index lenses for the same prescription.