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Keratotomy for astigmatism using an arcuate keratome
K D Hanna1, J M Hayward, K B Hagen
1Opthalmology Department, Hôpital Hotel-Dieu, Paris, France.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|July 1, 1993
Summary
A novel surgical instrument precisely creates corneal incisions for astigmatism correction. This system allows predetermined depth, length, and location, showing accurate results in initial trials.
Area of Science:
- Ophthalmology
- Corneal Surgery
- Ophthalmic Instrumentation
Background:
- Astigmatism is a common refractive error affecting vision quality.
- Accurate corneal incisions are crucial for effective astigmatism correction surgery.
Purpose of the Study:
- To introduce and evaluate a new instrument for creating transverse arcuate corneal incisions.
- To assess the precision and efficacy of the instrument in controlling incision parameters.
Main Methods:
- Development of a surgical system featuring a conical housing with fixation and two micrometric diamond knives.
- Predetermined control over incision depth, length, and location.
- Light microscopy analysis of incisions in donor corneas and successful clinical application in five eyes.
Main Results:
- The instrument allows for precise control over corneal incision parameters.
- Incision depth was accurately achieved, with low-speed sweeps reaching approximately 100% of the set depth.
- Variability in incision depth was linked to blade sharpness, highlighting the importance of instrument maintenance.
Conclusions:
- The described system offers a precise method for performing transverse arcuate corneal incisions.
- The instrument demonstrates potential for accurate astigmatism correction.
- Further studies are warranted to validate long-term outcomes and refine instrument performance.