Eye Muscle Surgery to Treat Congenital Nystagmus

Launched by NATIONAL EYE INSTITUTE (NEI) · May 21, 2002

Keywords

ClinConnect Summary

This is a prospective open-label pilot study of a new surgical approach never before performed on humans. Subjects of this study are patients with congenital nystagmus and no other treatment options. Using standard surgical techniques we will determine if simple tenotomy with reattachment will reduce their nystagmus. An oculographic reduction of the nystagmus is measured by the Nystagmus Acuity Function (NAF), considered a primary outcome. Phase II of the study includes binocular visual acuity as a second primary outcome. A 20% improvement in NAF will be considered a clinically significant ...

Gender

ALL

Eligibility criteria

• • Patients must have a clinical and oculographic diagnosis of CN, and no other treatment options.
• • Patients must have binocular best corrected visual acuity of 20/200 to 20/30.
• • Patients must be 18 years of age or older for the pilot study (Phase I and for the first 5 patients of Phase II).
• • Patients must be able to undergo a complete ophthalmic evaluation.
• • Patients must be able to undergo and cooperate for standard eye movement recordings.
• • Patients must be able to medically undergo extraocular muscle surgery.
• • Patients must be available for 1 year of post-surgical follow-up.
• • Patients must understand and sign an informed consent, or have their legal guardian sign an informed consent.
• • Patients must have three oculographic recordings performed within 4 months prior to surgery.
• • No previous extraocular muscle surgery.
• • No plan to have extraocular muscle surgery for strabismus.
• • Patients must not have a clinically significant null position greater than 15 degrees from primary position horizontally, 5 degrees vertically, or 5 degrees torsionally.
• • Patients must not be on systemic medication known to affect ocular oscillations.
• • No acquired eye disease other than refractive error that is known to decrease visual acuity (e.g., cataracts, glaucoma, age related macular disease, etc.).
• • No previous ophthalmic or orbital surgery.
• • No concurrent medical conditions or known risks which would increase their chance of an adverse event due to general anesthesia (Greater than an ASA Class 1) or have a family history of malignant hyperthermia.
• • Patients must not be pregnant at the time of surgery.
• • Patients must not be less than or equal to 6 months of age.