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 yearsÌý
- 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 lensesÌý
- Willing to sign informed consent and comply with study schedule
- Corrected normal vision, defined as minimum of 20/40 in each eyeÌý
- 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 studyÌý
- Currently not using any ocular or system mediciations, including antihistamines
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The research study is looking to recruit people who meet the following criteria:
• Aged 18-45 years old (inclusive)
• Able to read and comprehend English and give informed consent as demonstrated by signing a record of informed consent
• Habitual contact lens wearer
• Eyesight correction spherical (short sight) between -0.50 to -7.50 or (long sight) +0.50 to +1.75 (inclusive), with < 1.00 Cylinder.
• Able to achieve a minimum 6/9.5 binocular visual acuity while wearing the study lenses (with over-spectacles if required)
• Willing to wear the study contact lenses for a minimum of 8 hours per day
• Willing to refrain from wearing their habitual contact lenses for a minimum of 24 hours prior to each visit
• Have health and ocular health findings which would not prevent the participant from safely wearing contact lenses
• Willing to not use any rewetting eye drops on the morning of study visits and while wearing the study contact lenses
• Willing to refrain from swimming, showering, and/or sleeping while wearing the study contact lenses
• Willing to undergo the tests as outlined in the information statement