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Contact lenses

Lenses types

CONTACT LENSES

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.

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ADVANTAGES OF CONTACT LENSES

AESTHETIC AND MEDICAL

In addition to aesthetics, there are numerous medical advantages over glasses:

  • better visual acuity (up to 30% compared to spectacle correction)
  • maximum correction in both eyes and in cases of diopter difference
  • the limitation of the field of vision by the spectacle frame is avoided
  • there is no fogging of the glasses, tingling in the nose or behind the ear

The choice of lens depends on the dipterous (refractive anomaly), the needs and lifestyle of the patient. Depending on the type of contact lens, there can be soft, gas-permeable (GP) and hard (PMMA) lenses.

SOFT CONTACT LENSES

ADVANTAGES

  • they are comfortable and do not require adaptation, when put on the eye they can be worn immediately all day
  • better visual acuity and peripheral vision, the wider the field of vision compared to glasses
  • there is no blurring of vision, the image is clear in all weather conditions
  • the shape of the lens adapts to the eye, they cannot fall out of the eye and provide all the freedom of movement
  • they are simple and easy to maintain using just one soft lens solution
  • they are ideal for playing sports
  • they do not change the natural appearance of the face

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.

ADVANTAGES

  • stable and sharp vision
  • easy to handle and care for
  • last longer than soft contacts
  • good solution for corneal conditions that soft contacts and eyeglasses cannot correct

Contact lenses can be worn only if the eyes are healthy.

It’s essential that soft contact lens users follow instructions for proper lens wear and care.

Frequently Asked Questions and answers