Frequently Asked Questions
- What is a Sight Test?
- What is myopia or 'nearsightedness'?
- What is hyperopia or 'farsightedness?
- What is a high index lens?
- What is an anti-reflection coating?
- What are progressive lenses?
A sight test provides our customer with a prescription with which to purchase eyewear. This is not an eye health examination so if you have an issue that requires medical attention we will provide the names of a few local Optometrists who can address your concerns.
Myopia is an eye condition (known as a refractive error), that can cause objects in the distance to appear blurry. This often happens when eye growth is rapid, or the eye becomes too long. When you try to read a sign in the distance, the rays of light are focused in front of the retina, instead of directly onto it. This causes your vision to become unclear and blurry. It's also called nearsighted because you can see up close but objects far away are blurry or unclear. In eyewear, the eyes can appear smaller when looking at a person wearing this type of lens.
Farsightedness https://www.myeyedr.com/eye-health/vision-simulator is a common type of refractive error where objects in the distance may be seen more clearly than objects that are near. In eyewear, the lenses are thicker in the centre and thinner on the edge, which can make the eyes can appear to be enlarged or magnified when looking at a person wearing these types of lenses
High index lenses are made with a particular type of plastic that refracts light more effectively than standard index lenses. This usually means that they can be cut thinner than other lenses while providing perfect vision correction for stronger prescriptions.
Anti-reflective coating or anti-glare coating is a microscopically thin multi-layer coating that eliminates reflections from the front and back surface of eyeglass lenses. This allows over 95% more light to enter your eye and is incredibly advantageous at night, especially while driving. This coating is also recommended to reduce reflections while wearing tinted and polarized lenses.
Progressive lenses are an update on bifocal and trifocal lenses. Both of these more traditional types of glasses have lines in the lenses. Progressives have a seamless look. A progressive lens is used when the eyes can no longer focus up close or far away.