Patient Information: Orthokeratology

Orthokeratology is a treatment for correcting Myopia;
nearsightedness.
Orthokeratology requires the patients to wear a special typeof contact lenses during sleeping to flatten the corneas(please see the figures on the right).
The key features of orthokeratology include:●Patients can live their daily routines during the daytime
without the contact lenses or glasses.
●Correction is also possible for corneal astigmatisms.
●No surgical procedures, this treatment allows the cornea
to revert to its original shape after lens removal.

Orthokeratology Theory
Indications and Contraindications
Indications (patients who can be able to treated bywith the orthokeratology):●Eyes with a clear cornea that have no history of surgery●Nearsightedness from -1 diopter up to -6 diopter●With-the-rule astigmatisms of up to 1/2 of the spherical diopters or against-the-rule astigmatisms
of up to 0.75D●Understanding of the explanations given by the doctors and orthoptists.
Contraindications (patients who cannot be treated by the orthokeratology):●Ophthalmic diseases (keratoconus, infection, scar, herpes, nystagmus, glaucoma and uveitis,etc.)●Severe nearsightedness, severe astigmatism or farsightedness●Severe allergic conjunctivitis●Severe dry eye disease●A history of refractive surgery or ophthalmic surgery (strabismus operation and cataract surgery,among other surgical procedures)●Pregnancy●Sleep-deprived patients (about 6 hours of sleep)●Those who are unable to use the lenses properly●Those who are unable to come in for periodic follow-ups●Those who are unable to follow instructions from doctors and orthoptists－1－Treatment ProceduresFirst examination and consultation●You will receive an interview and a few eye examinations to assess whether

orthokeratology is possible for you.
●If you pass the primary examination, you will be fitted with trial lenses to check thecondition of the lenses worn.
●If the trial lens was suitable, you will receive the instruction of Orthokeratology andpractice wearing and removing the lense.
Trial (1 week)●During the trials, the clinic will rent you the trial lenses and lens care solutions.

Please wear the lenses before going to bed and remove them the next morning asinstructed.
●If there is any ocular abnormality, please stop wearing the lenses and contact to theclinic.
After the week Trial●Please bring the lenses inside the lens case to the clinic.
●You will undergo eye examinations to determine whether the treatment is effective.
●If you wish to start the Orthokeratology, your own lenses will be order. You may continue

using the trial lenses until the lens arrival.
●In case the trial lenses did not work as expected, you may continue the trial with adifferent prescription .
Lens(es) receipt●We will contact to you when the lens arrived. After that you receive your own lens.

Please bring the trial lenses and return the trial lens.
Follow-ups●Patients are scheduled for the follow-up visits after 1, 3, 6, 9, and 12 months after from thebeginning. Periodic follow-ups should not be skipped because they are essential for monitoring yourpost-treatment visual acuity, corneal condition and for early detection of any complications.
●You may require other examinations according to the eye condition at the follow-ups.
●If you experience a sudden change in vision or any abnormality, please consult to us prior to thescheduled follow-ups.
●During the warranty period, if the different prescription is required, the treatment fee will cover thecost of the lenses.

－2－Potential Complications●As with the conventional daytime hard contact lenses, corneal inflammations including corneal

erosion and corneal epithelial detachment, conjunctivitis, hyperemia/discharge, pain, corneal
neovascularization, infections, lens adhesion to cornea, lens shift, corneal edema, corneal endothelial
impairment, astigmatism, halos and other complications may occur. It is important to come to regularfollow-ups to avoid these complications.
Other complications associated with orthokeratology include changes in vision before the visualacuity stabilizes, inadequate correction, night glare and halos.

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