Orthokeratology, often referred to as Ortho-k or corneal reshaping therapy, is a specialized non-surgical technique designed to correct refractive errors of the eye, such as myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. Unlike traditional methods like glasses or contact lenses, orthokeratology involves wearing specially designed rigid gas-permeable contact lenses overnight to reshape the cornea temporarily and provide clear vision during the day without the need for corrective lenses.
Gas permeable (GP) lenses specialized for ortho-k are inserted at bedtime and worn as you sleep. Throughout the night, the lenses reshape your cornea gently so that your vision becomes clear on the following morning. The correction is temporary, and ideally no eyeglasses or contact lenses will be needed on the next day or two. In order to maintain sharp visual acuity on a daily basis, you need to wear the ortho-k reshaping lenses every night.
Dr. Viet Tran is specialized in orthokeratology care and has successfully corrected patients of all ages to help eliminate the use of daytime glasses or contacts, as well as control myopia in young children.
Key aspects of orthokeratology include:
Customized Fitting: Each individual's eyes are unique, our office use advanced computer mapping and measuring techniques to design lenses that fit the patient's eyes precisely. These lenses are worn overnight, during sleep.
Temporary Effect: The corneal reshaping achieved through orthokeratology is temporary. The effects usually last throughout the day, providing clear vision, but the cornea gradually returns to its original shape, so the lenses need to be worn regularly to maintain the corrected vision.
Myopia Control: Ortho-K has gained attention not only as a vision correction method but also as a potential means of controlling the progression of myopia, especially in children and teenagers. Research suggests that orthokeratology might slow down the elongation of the eye, which is associated with the progression of myopia.
Non-Surgical and Non-Invasive: Unlike laser eye surgery, orthokeratology is a non-surgical procedure that doesn't involve any incisions or tissue removal. This makes it a reversible option for individuals who want to correct their vision but are hesitant about surgical interventions.
Candidacy and Monitoring: Ortho-k is particularly well-suited for nearsighted people who are not appropriate candidates for vision correction surgery, such as children. Individuals of all ages with healthy eyes have option to explore ortho-k, as it can be halted at any point without permanent effects to the eyes. A thorough eye examination is necessary to determine whether an individual's corneas are suitable for reshaping. Regular follow-up appointments are crucial to monitor corneal health and ensure the lenses are fitting correctly.
Advantages and Considerations: Ortho-K lenses are a convenient option for people involved in sports or other activities where glasses or conventional contact lenses might be cumbersome. However, it requires commitment and proper care. Cleaning and disinfecting the lenses daily are essential to prevent eye infections.
Vision Results from Orthokeratology: Success rates for ortho-k are generally higher for more mild vision prescriptions. The ideal goal is to provide 20/20 vision without any need for eyeglasses or contacts during the day. According to FDA trials conducted on both CRT and VST lenses, more than 65% of ortho-k patients achieved 20/20 visual acuity. A whopping number of more than 90% of ortho-k patients achieved 20/40 vision or better (this is the legal requirement for driving without vision correction in most states). Consult with your eye doctor to find out if your vision prescription is within range for successful ortho-k treatment.Note that although improvement in vision is generally reported within a day or two of wearing ortho-k overnight, the full effects may not be experienced until the lenses are worn for a few weeks. During this transition period, your vision will probably not be as crisp as it was with regular contacts or eyeglasses, and glare or halos around lights may be visible. Until ortho-k works fully, a temporary pair of eyeglasses may be required for specific actions, such as driving at night.
Risks and Side Effects: While orthokeratology is generally safe when done correctly and under professional supervision, there are potential risks. Improper lens hygiene, over-wearing the lenses, or ignoring discomfort can lead to corneal infections, ulcers, and other complications.
