It is known that contact lenses are made of hard or flexible material and they come in different sizes and bends. The contact lens prescription is based on the specific measurement of your eye and he is compared to certain specifications and measurements of contacts. There are various types of equipment and methods that are used to measure contact lenses. Just check the following tips to learn how to measure contact lenses.
The first thing you should do is to use the PD optical stick or ruler to measure the diameter of the lens.The measure will be recorded in mm. most contacts usually vary from 8 to 14 mm throughout.
The second thing is to measure the curvature of the lens, using the lens clock.Lens Clock is known as an optical instrument that measures the base curves of contact lenses and glasses. base curves of contacts are created to match the curvature of the cornea. If the number is less, the curve of your cornea will be sharper.
The third thing is to use lensometer. Lensometer is known as s standard piece of equipment, optical that used to measure the strength of the lenses. However, only certain types of lensometer that has the ability to measure the power of contact lens prescription so you must ensure that you are using lensometer, which measures the contacts.
The room is to measure the toric contact lens.This must be done by checking the makings of orientation of the lens, while the lens is in the eye.These types of special markings can help you know if your contact is in the right place at the eye of a way to correct astigmatism. Normally, marking horizontally are situated in the middle and on the outside of the lens that is called "3 and 9 o'clock.
The last thing is to use wave front aberrometry. it is known that aberrometers are using light technology to measure the overall power and the desertion of the eye, but recently have also been used to measure contact lenses. Moreover, the machine can work well as rays of light travel through contact lens control.
