How to Test the Abrasion Resistance of Ophthalmic Lenses
In this article, we will be discussing abrasion testing for ophthalmic lenses. Abrasion resistance is an important property of ophthalmic lenses, as it determines how well they resist being scratched. We will be using the abrasion test described by ASTM F903 to measure this property. In addition, we will also be discussing haze measurement and how to use the haze-gard i haze meter from BYK-Gardner to determine the transparency of ophthalmic lenses.
How to Test for Abrasion & Transparency
The abrasion test, or referred to as Bayer test, is conducted by mounting the lens to be tested in a holder and then abrading it with a rotating abrasive wheel under specified conditions of load, speed, and number of abrasion cycles. The abraded lens is then examined for haze and scratches. The transparency of the lens is then measured using the haze-gard i haze meter, which is a portable, hand-held instrument that measures the amount of light scattered by the lens.
The abrasion test is a useful way to measure normal abrasion or the abrasion resistance of ophthalmic lenses. However, it is important to note that this test does not simulate all potential sources of abrasion that a lens may encounter in use. For example, abrasion from cleaning materials or contact with other objects, (such as eyeglasses) can be significant sources of abrasion that are not accounted for in this test. Nevertheless, the abrasion test is still a good way to compare how abrasion-resistant different lenses are and to screen for abrasion-related problems.
The haze-gard i haze meter is a valuable tool for measuring the transparency of ophthalmic lenses. This instrument is portable and easy to use, making it well-suited for quality control applications in the lens industry. The haze-gard i can also be used to measure the haze of other transparent materials, such as windows and plastics.
In conclusion, abrasion or Bayer testing is a useful way to measure the abrasion resistance of ophthalmic lenses. The haze-gard i, is a valuable tool for measuring the transparency of these lenses. By using both methods, we can more accurately assess the quality of ophthalmic lenses.
If you have any questions about abrasion testing or the haze-gard i, please contact us. We would be happy to assist you.