Orthokeratology (ortho-k) is the assembly of gas-permeable contact lenses specially designed for use at night. While you sleep, the lenses gently mold the front surface of the eye (cornea), so that the next day, after you take them off when you wake up, you can see clearly. Know more about Best Orthokeratology Melbourne here.
Orthokeratology lenses are prescribed for two purposes:
•To correct refractive errors; mainly myopia, but also hyperopia and astigmatism. In some cases, orthokeratology is also used to correct presbyopia.
•To slow the progression of myopia in childhood.
Orthokeratology lenses are also known as contact lenses to mold the cornea or contact lenses for night use to correct or control myopia. A specific brand of ortho-k lenses, Bausch + Lomb, has developed a lens assembly technique called Vision Shaping Treatment (VST). But orthokeratology can be successfully performed safely with other gas permeable (PG) lenses and other mounting techniques to mold the cornea. Only highly breathable PG lenses that have been approved by the Food and Drug Administration (FDA) for overnight use should be used.
How does it work?
Orthokeratology contact lenses are used during sleep hours. During the night the necessary corneal changes are produced that allow seeing well during the day. The effects of the lens are produced from the first day, reaching the optimal changes within a few days of use. Being a completely reversible and safe process, if you stop using the contact lens, the cornea returns to its original state. For this reason, it is necessary to wear contact lenses regularly for sleep.
Orthokeratology is for?
Contact lenses for Orthokeratology Melbourne are indicated for the temporary reduction of myopia providing better visual capacity without any type of optical compensation. The ideal patient is one who presents myopia less than or equal to -4.50 diopters, associated or not with an astigmatism of up to 1.50 diopters. In the case of presenting another type of graduation, a vision professional should evaluate the feasibility of the treatment.
What can you expect when you start with orthokeratology?
The ophthalmologist will start by measuring the curvature of the cornea with an instrument called a corneal topographer, a painless procedure that lasts about one minute and produces a topographic map of the surface of the eye. The doctor can use lenses that are available in the office the same day he takes the measurements of the corneal topography, or he can order ortho-k glasses to be placed at a later date. You may need a series of temporary lenses to see correctly until you reach the desired recipe. In most cases, up to three pairs of lenses are needed to achieve the maximum effect the of vision correction. When you start wearing orthokeratology lenses you are likely to feel the lenses in your eyes until you fall asleep. Over time, lenses are usually more comfortable immediately after insertion.
What advantages does it offer?
Orthokeratology Melbourne allows you to have good vision without having to undergo surgery, or use glasses or contact lenses. Simply putting your contact lenses at night, while you sleep. By not needing correction during the day it becomes an ideal system for athletes, people who have a dry eye with their contact lenses or all those who want to go without any correction during the day. Orthokeratology is an especially interesting treatment in young patients since different scientific studies have shown the efficacy of this treatment in controlling the progression of myopia.
Side effects and contraindications:
Contact lenses for Orthokeratology do not usually cause problems, but there is a possibility that at some point one of the following symptoms may appear:
•Increased foreign body sensation.
•Eye irritation.
•Unusual sensation in the light.
•The sensation of pricking, stinging and pain.
•Sudden vision deterioration.
•Accumulation of secretion in the eye.
•Continuous tearing.
•Blurry vision.
•Ocular dryness.
If any of the symptoms mentioned above occur, the treatment should be suspended and immediately consult with your optometrist or ophthalmologist.
Nor should orthokeratology contact lenses be used in case of:
•Presenting inflammation, infection, allergies or eye injuries, changes in corneal sensitivity, wounds or diseases in the cornea and/or eyelids.
Your optician-optometrist or ophthalmologist at A+ Optometry team will be responsible for adapting this type of lens. This treatment is contraindicated in pathological corneas. The A+ Optometry team is highly experienced and skilled when it comes to ocular care
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