Contact lenses are an excellent choice for nearly anyone who needs vision correction and doesn’t want to wear eyeglasses full time. Contact lenses carry no age restriction; adults and children can equally use them. New technologies and lens design provide quality vision at both distance and up close.
Optotim offers a wide range of contact lenses and contact lens solutions of top global manufacturers: Bausch +Lomb, Alcon, Optix, CooperVision, Opticus.
Daily, monthly, quarterly and annual replacement lenses are available as well as daily-wear and extended-wear contacts to meet vision needs and lifestyle of users.
Visit Diopta online store
Quickly and easily purchase contact lenses and lens maintenance solutions from the world’s most famous manufacturers.
ADVANTAGES OF CONTACT LENSES
GAS PERMEABLE AND HARD CONTACT LENSES
PMMA lenses are conventional hard contact lenses made from a transparent rigid plastic material called polymethyl methacrylate (PMMA).
PMMA lenses have excellent optical properties, but they do not allow for oxygen transfer to the cornea. The only way for this vital element to reach the cornea is for tears to wash underneath the lens with each blink. In order for this blink-induced, tear-pumping action to occur, PMMA lenses have to be made relatively small in size.
PMMA lenses have been replaced by gas permeable lenses and are rarely prescribed today.
Gas permeable (GP) contact lenses are rigid lenses made of durable plastic that transmits oxygen. Most GP contact lenses incorporate silicone, which makes them more flexible than PMMA. Silicone is oxygen permeable, so oxygen can pass directly through GP contact lenses to keep the cornea healthy.
They are designed for patients with keratoconus and irregular astigmatism and can be used to correct any type of refractive error. GP contacts are the best choice for individuals for whom soft contacts don’t produce the desired visual acuity.
It usually takes some time for eyes to adjust to gas permeable contact lenses when users first start wearing them.