OK lenses are a type of contact lens with an inverse geometric design. They alter the corneal curvature through mechanical pressure on the cornea, negative tear pressure, and eyelid pressure, gradually normalizing the refractive state of the retina’s mid-peripheral area. This temporarily reduces myopia, ultimately improving myopia and improving uncorrected visual acuity. OK lenses are currently an important method for controlling the progression of myopia in clinical practice, but some myopic patients are not suitable for wearing them. Therefore, those seeking to improve their myopia through wearing OK lenses are generally advised to consult with a reputable medical institution to avoid compromising their eye health.
Applicable people
OK lenses are generally suitable for patients with myopia below 600 degrees. In addition, people with special occupational needs such as athletes, divers, pilots, actors, and soldiers can also improve their vision by wearing OK lenses when necessary.
Taboo groups
1. People with impaired immune function due to eye or systemic diseases.
2. Children under 8 years old.
3. Those who are using drugs that cause dry eyes or may affect vision, corneal curvature, or change eye physiology.
4. People with eye diseases such as acute or chronic keratitis.
5. Those who have too high psychological expectations of wearing OK lenses, are extremely sensitive and nervous, have poor compliance, and cannot take good care of themselves.
6. Those with a history of allergy to contact lenses or contact lens care solutions.
7. Women before pregnancy, during pregnancy and breastfeeding.
Technical/surgical risks
1. Corneal complications: These include corneal edema, corneal neovascularization, corneal endothelial cell changes, corneal hypoesthesia, non-infectious keratitis, corneal epithelial damage, punctate keratitis, sterile corneal infiltrates, and infectious keratitis. If these complications occur, discontinue wearing OK lenses and seek treatment directed at the cause. After recovery, replace the lenses and case, use a strong antiseptic solution, develop good hygiene habits, and strictly follow the instructions in the contact lens manual to properly care for the lenses to reduce the risk of complications.
2. Conjunctival complications: such as papillary conjunctivitis, non-infectious red eye, infectious conjunctivitis, etc.
Postoperative care
Pay attention to eye care and lifestyle behavior management after wearing.
1. Eye care: Keep eyes clean and hygienic, avoid rubbing eyes with hands to avoid infection.
2. Lifestyle management: Before wearing glasses every day, carefully check the smoothness of the lens surface and edges to ensure that the lenses are clean; before taking off and wearing glasses, wash your hands and regularly replace the suction sticks, glasses boxes, double boxes and other small tools used to prevent infection; follow the doctor’s advice for regular check-ups.
Preoperative precautions
1. Communicate with the doctor to understand the specific process, cost, and daily care of fitting glasses, and be mentally prepared.
2. Complete relevant examinations, such as fundus examination, eye B-ultrasound, corneal diameter measurement, etc., to determine whether you are suitable for wearing OK lenses.
3. If you have a recent history of eye surgery, trauma, or use of eye medication, you must inform your doctor in advance.
4. Pay attention to eye hygiene and ensure adequate rest.
Surgical procedure
The operation process of OK lenses mainly includes eye examination, lens cleaning and lens wearing.