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[Myopic regression after photorefractive keratectomy]
1Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730.
Summary
Myopic regression after excimer laser photorefractive keratectomy (PRK) is linked to the degree of correction attempted and patient age. Factors like corneal haze and corticosteroid use also influence regression rates.
Area of Science:
- Ophthalmology
- Refractive Surgery
- Corneal Physiology
Context:
- Excimer laser photorefractive keratectomy (PRK) is a common procedure for correcting myopia.
- Myopic regression, a return of myopia after refractive surgery, can impact long-term visual outcomes.
- Understanding factors contributing to myopic regression is crucial for optimizing surgical techniques and patient management.
Purpose:
- To investigate the factors associated with myopic regression following photorefractive keratectomy (PRK).
- To analyze the correlation between attempted correction, patient demographics, and refractive outcomes.
- To identify clinical indicators of myopic regression in a cohort of myopic patients.
Summary:
- A study of 103 eyes with myopic regression (>or= -1.00 D) after PRK revealed a significant positive correlation with the extent of attempted correction.
- Higher regression rates were observed in the high myopia group (6.93%) compared to the moderate myopia group (1.17%).
- Increased regression was noted in older patients and was often accompanied by corneal haze and changes in K value, with topical corticosteroid use playing a role.
Impact:
- Findings highlight the importance of considering the extent of attempted correction and patient age when predicting myopic regression after PRK.
- The association with corneal haze and corticosteroid management suggests potential targets for intervention to minimize regression.
- This research aids in refining PRK protocols and patient counseling to improve long-term refractive stability.