Orthokeratology, often called Ortho-K for short, is a form of safe, non-surgical vision correction. Ortho-K contact lenses are worn while the patient is sleeping to improve vision by reshaping the cornea. This process allows the freedom to see clearly without daytime vision correction. View our upcoming studies.
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This study might be a good fit if you meet the following criteria:
- Aged between 18-40 years
- Experienced contact lens wearer or someone new to wearing contact lenses
- Short sighted (myopic) between -0.50 to -15.50 diopters or long sighted (hyperopic) between +0.50 to +1.75 diopters without astigmatism or with astigmatism less than 1.75 diopters
- Willing to wear contact lenses for a minimum of 6 hours per day at least 5 days per week for 3 months.
- Attend 4 study visits at the School of Optometry and Vision Science – visit 1, visit 2 (4-6 days after visit 1) and 2 monthly visits thereafter
- Willing to not use any rewetting eye drops for the duration of the study.
- Do not have any active eye infection or allergies
- Are not pregnant, do not have any systemic disease such as diabetes or neurological disorder such as epilepsy
- Do not use medications that may affect the eye such as antihistamines
- Not have undergone refractive surgery
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This study might be a good fit if you meet the following criteria:
- Are over 18 years of age.
- Experienced soft contact lens wearers who have worn lenses for six months or more, at least four times a week, and for a minimum of six hours per day
- Having the symptoms of dry eye when wearing contact lenses
- Willing to sign informed consent and comply with study schedule
- Corrected normal vision, defined as minimum of 20/40 in each eye
- Willing to wear lenses a minimum of 6 hours per day at least 5 days per week and to not use any rewetting eye drops for the duration of the study (12 weeks)
- Have not had any ocular and systemic disease and history of eye trauma and eye surgery (chalazion excision, oculoplastic surgery)
- Have not severe insufficiency of lacrimal secretion (Dry eye)
- Are not pregnant or planning to become pregnant or breastfeeding during the study
- Currently not using any ocular or system mediciations, including antihistamines