High power lens with a measurement water cell

Area of Science:

• Optics
• Ophthalmology
• Metrology

Background:

• Measuring high plus ophthalmic lenses is challenging.
• Existing methods are often cumbersome, time-consuming, and inaccurate.

Purpose of the Study:

• To present a simple, effective method for extending the range of lensometers.
• To provide a practical solution for measuring high plus ophthalmic lenses.

Main Methods:

• Utilizing a simple water cell.
• Applying Snell's law for optical calculations.

Main Results:

• The water cell technique increases the measurement range of ordinary lensometers by approximately three times.
• This method offers a viable alternative for measuring high plus lenses.

Conclusions:

• The water cell method is a valuable technique for enhancing lensometer capabilities.
• This approach is particularly useful in low vision applications, improving accuracy and efficiency.