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Lasso procedure to revise overcorrection with radial keratotomy
M J Miyashiro1, R W Yee, G Patel
1Department of Ophthalmology and Visual Science, University of Texas Medical School at Houston, 77030, USA.
American Journal of Ophthalmology
|December 22, 1998
Summary
The lasso procedure effectively corrects hyperopic overcorrection after radial keratotomy, restoring 20/20 vision. Further studies are needed to confirm long-term stability and predictability of this surgical revision.
Area of Science:
- Ophthalmology
- Corneal Surgery
- Refractive Surgery
Background:
- Radial keratotomy (RK) is a refractive surgical procedure to correct myopia.
- Hyperopic overcorrection can occur post-RK, leading to visual impairment.
- Revision of overcorrected hyperopia after RK presents a surgical challenge.
Observation:
- A case series involving three patients (four eyes) with symptomatic hyperopic overcorrection post-RK.
- The lasso procedure, using a 10.0 monofilament nylon suture, was performed to revise the overcorrection.
- Suture placement was circumferential, overlapping the existing RK incisions.
Findings:
- Pre-procedure spherical equivalent refraction averaged +3.656 D (cycloplegic) and +2.250 D (manifest).
- Post-procedure, all eyes achieved 20/20 best-corrected visual acuity.
- Mean spherical equivalent refraction improved to +0.438 D (cycloplegic) and -0.156 D (manifest) at 1 month.
Implications:
- The lasso procedure offers an immediate surgical solution for symptomatic hyperopic overcorrection following RK.
- This technique shows promise for improving visual acuity in previously overcorrected eyes.
- Long-term predictability and stability of the lasso procedure require further investigation.