When the optometrist performs an eye test on you, the readings inform the lens maker as to how your lens should be shaped or coated. Today’s optometrist gains information digitally, which optical coating systems read and use as a template to help shape and cut lenses depending on your specific requirements. It’s fairly common these days, but it’s manufacturing magic in the grand scheme.
Step one is for you to take a vision test and receive your score. These examinations are supposed to evaluate different aspects of your vision, and provide the doctor with a measurable concept of how your vision works. Those data points tell the machine the right way to trim a lens in an effort to fit the needs of your eyes. Depending on the type of symptoms a patient exhibits, a particular geometrical shape must be taken in order to correct the vision. Astigmatism, as an example, requires a toric lens to correct. This kind of lens is spherical in shape, with a cap around the edge that makes an oval shape.
Once the lens has been correctly shaped, a coating is applied to give the lens anti-glare or anti-scratch properties. The end result is a thin film that does not obstruct patient vision.
Ebeam is also useful during this process, especially if a patient requires tinting to guard against light sensitivity. These techniques employ a better finish, without imperfections, resulting in a product patients can use and wear.
After the glass lenses have received a coating, the rims are formed to fit the contours of the patient’s face. Finally, the patient can try everything on and test his new vision.