| What is a contact lens?
It is a prescription medical device manufactured from
high-grade polymers. The contact lens rests on the front surface
of the eye and like eye glasses, bends light rays so that images
are properly focused on the retina.
What's the difference between hard and soft contact
lenses? Soft contact lenses are manufactured from hydrophilic
polymers (water-loving plastics).
Varying from 38% to 71%, the water content is what makes soft
contact lenses pliable. Hard contact lenses are not manufactured
from hydrophilic plastics and therefore do not contain water.
Although they can provide good ocular health, they are not as
comfortable initially as soft lenses.
What are planned replacement lenses?
Planned replacement is a complete program of contact lens
vision care in which contact lenses are replaced at planned
intervals throughout the year. The interval is decided by your
eye care practitioner based on the lens chosen, and the
patient's specific characteristics. Replacement cycles generally
vary from one month to three months.
What is astigmatism?
Astigmatism is a common visual distortion caused by an
irregularly shaped cornea. Approximately 45% of all patients
requiring vision correction have astigmatism.
What is myopia?
Myopia is commonly referred to as nearsightedness. A myopic
eye sees near objects very clearly within a certain range while
distance vision appears blurry. What is hyperopia? Hyperopia is
more commonly known as farsightedness. A hyperopic eye sees
distant objects clearly while near object appear blurry.
What is presbyopia?
Presbyopia is a visual condition which becomes apparent in
middle age, in which the loss of elasticity of the eye causes
difficulty or inability to focus sharply for near vision.
What is the difference between daily wear and flexible
wear?
Daily wear lenses are worn during the day and must be removed
at bedtime. Flexible wear lenses are thinner or have a higher
water content, allowing more oxygen to pass to the eye. They can
be worn continuously, even overnight, for up to seven days.
Eligibility for flexible wear use is evaluated by an eye care
professional. What is the difference between disposable lenses
and planned replacement lenses? Disposable lenses are meant to
be worn once and thrown away while planned replacement lenses
are worn for a prescribed period of time and replaced at regular
intervals. What is the appropriate wearing schedule for me? Your
eye care professional will prescribe your wearing schedule based
on the health of your cornea, your lifestyle, your preference
and the type of lens you want to wear. |