Your optometrist can generate a prescription for eyewear at the completion of an eye examination. Before this can be finalised the optometrist should perform an eye examination to check your eye health. The prescription should include all the measurements necessary to determine which lens is required and will provide clear and comfortable vision. This may include:
- lens power (sphere power, cylinder power, axis, near addition)
- lens material
- lens type (single vision, bifocal, multifocal)
However your prescription is only one piece of information that will be used to determine how well you see with your new eyewear. During the process of selecting and being properly fitted for your new eyewear, your optometrist can determine a number of things to make sure your new eyewear is customised to give you clear and comfortable vision while ensuring you look great. This includes:
- determining the height to place the optical centre of the lens in your frames;
- selecting the size;
- selecting the right frame shape;
- which design and curvature of lens to use;
- what lens material to use;
- what coatings to use on your lenses that best suit your needs;
- measuring how high to place the multifocal (if you wear a multifocal lens); and
- adjusting the frame to your face.
If the above are not done correctly and specifically for you, it’s not uncommon to have problems with your new prescription glasses that may be immediate, or appear after using your new eyewear for an extended period of time. Common complaints for improperly ordered or fit eyewear can include blurry vision, headaches, eyestrain or pressure marks on your nose.