Ten-year follow-up of 360 degrees intrastromal corneal rings for myopia.
OBJECTIVE
To determine the safety, efficacy, and stability of intrastromal corneal rings 10 years after placement for myopia.


METHODS
Ten eyes with myopia treated with the placement of 360 degrees complete intrastromal corneal rings with the ends sutured together were evaluated at 10-year follow-up for the following: uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), manifest refraction spherical equivalent (MRSE), induced manifest refractive cylinder, keratometry readings, slit-lamp findings, and ultrasound central pachymetry. Ten-year data were compared to 1-year results to assess visual stability over time.


RESULTS
No statistically significant difference was noted between UCVA at 1 year and 10 years. At the 10-year examination, 90% of patients had BSCVA > or = 20/25 and 100% had BSCVA > or = 20/30. There was no statistically significant difference between MRSE at 1 year and 10 years. At the 10-year examination, induced manifest refractive cylinder was >1.00 diopter (D) in 0% of eyes and < or = 0.25 D in 60% of eyes. There was no statistically significant difference between mean central keratometric power at 1-year follow-up compared with 10-year follow-up. No statistically significant difference was noted in central corneal thickness between 1 and 10 years in the eyes studied.


CONCLUSIONS
Intrastromal corneal rings are an effective and stable method of correcting mild myopia based on optic parameters.
Schwartz
Andrew R
AR
Cornea Service, Department of Ophthalmology, Mount Sinai School of Medicine, New York, NY , USA.
Tinio
Bernard O
BO
Esmail
Fatema
F
Babayan
Alejandro
A
Naikoo
Huma N
HN
Asbell
Penny A
PA
D000328:Adult; D003319:Corneal Stroma / Q000000981:diagnostic imaging / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000000981:diagnostic imaging / Q000601:surgery*; D019736:Prostheses and Implants; D019919:Prosthesis Implantation; D012029:Refraction, Ocular; D016896:Treatment Outcome; D014463:Ultrasonography; D014792:Visual Acuity