Contact lenses are used to correct vision but they can be used for cosmetic or therapeutic reasons as well. There are many reasons for what people choose to wear contact lenses. The most motivating factors are aesthetics and cosmetics for the people who would like to change the appearance of their eyes or would like to avoid from glasses.
If we compare with glasses, lenses give better peripheral vision, and
they don’t collect moisture as snow, rain, sweat or condensation. Lenses are
ideal for outdoor activities, unlike spectacles. One of their best sides is
that a contact lens wearer can wear as well as sunglasses or other eye wear of
their choice. Also, keratoconus and aniseikonia are better corrected by contact
lenses than with glasses.
They can be classified in different ways. For
their function contact lenses are:
1. Corrective;
2. Other types of vision correction (for the
people with color deficiencies);
3. Cosmetic;
By their material contact lenses are:
1. Rigid, made of glass which weren't comfortable enough to gain widespread popularity;
2. Soft, with oxygen permeability;
3. Hybrid, with rigid centre and soft skirt.
For their wear schedule, there are:
1. Daily wear lenses;
2. Extended wear lenses.
The use of contact lenses is safe as long as
they are used correctly. The risk of possible damage of the eye arises when lenses are used too
long or when people sleep with lenses that are not designed for extended wear.
One of the most well-spread complications is
that the lens is a barrier to oxygen. Mishandling can cause problems and
complications, as well. Removal of contact lenses must be done very carefully
otherwise it can result in injury to the eye or damage to the eye. Taking a nap
with contact lenses may result in vision problems. In case of serious effects,
the only option is surgery.
You should keep in mind, that before touching
lenses, hands must be clean. A dirt free and clean container always must be
stored for contact lenses to avoid side effects and risks.
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