Keratoconus Clinical Trial
Official title:
Intacs for Keratoconus
NCT number | NCT00347230 |
Other study ID # | R419/14/2005 |
Secondary ID | |
Status | Recruiting |
Phase | N/A |
First received | June 30, 2006 |
Last updated | July 3, 2006 |
Start date | October 2005 |
To study the effects Intacs intracorneal ring segments(Addition Technology, Inc) insertion in the treatment of keratoconus
Status | Recruiting |
Enrollment | 20 |
Est. completion date | |
Est. primary completion date | |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Both |
Age group | 21 Years and older |
Eligibility |
Inclusion Criteria: - Patients must have keratoconus (mild to moderate). - Visual acuity with contact lenses must be better than or equal to (20/40). - Patients must be intolerant of contact lenses, i.e., they must be unable to wear contact lenses for a whole day. - Patients will have a corneal thickness of 425 microns at the site of ICRS (INTACS inserts) placement (the thinnest region of the cornea). - In terms of general health, patients must not have any illnesses posing an immediate threat to life. - Patients must have provided written informed consent at least one week prior to surgery. - Patients must over 21 years of age. - Patients' contact lenses must have been removed at least one week prior to surgery for soft lenses and two weeks prior to surgery for hard lenses. Exclusion Criteria: - Positive pregnancy test. - Breast-feeding. - History of previous ophthalmologic surgery on the operative eye. - Patients with corneal stromal disorders. - Patients with history of herpetic keratitis. - Patients with retinal disorders. - Corneal grafts. - Patients refusing to remove contact lenses one week before surgery for soft lenses and two weeks before surgery for hard lenses. - Patients with amblyopia (VA <1110 for the contralateral eye). - Patients with corneal thickness <425 microns. - Patients with TOP <10 mmHg or >21 mmHg. - Patients taking part in other biomedical research in the 30 days prior to the start of this study. - Patients with an uncooperative disposition. |
Allocation: Non-Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
Country | Name | City | State |
---|---|---|---|
Singapore | Singapore National Eye Centre | Singapore |
Lead Sponsor | Collaborator |
---|---|
Singapore National Eye Centre |
Singapore,
Colin J, Cochener B, Savary G, Malet F, Holmes-Higgin D. INTACS inserts for treating keratoconus: one-year results. Ophthalmology. 2001 Aug;108(8):1409-14. — View Citation
Colin J, Cochener B, Savary G, Malet F. Correcting keratoconus with intracorneal rings. J Cataract Refract Surg. 2000 Aug;26(8):1117-22. — View Citation
Schanzlin DJ, Asbell PA, Burris TE, Durrie DS. The intrastromal corneal ring segments. Phase II results for the correction of myopia. Ophthalmology. 1997 Jul;104(7):1067-78. — View Citation
Siganos CS, Kymionis GD, Kartakis N, Theodorakis MA, Astyrakakis N, Pallikaris IG. Management of keratoconus with Intacs. Am J Ophthalmol. 2003 Jan;135(1):64-70. — View Citation
Siganos D, Ferrara P, Chatzinikolas K, Bessis N, Papastergiou G. Ferrara intrastromal corneal rings for the correction of keratoconus. J Cataract Refract Surg. 2002 Nov;28(11):1947-51. — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Visual acuity | |||
Primary | Refraction | |||
Primary | Corneal topography | |||
Secondary | Patient satisfaction following procedure |
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