SUMMARY
Purpose:
To present three patients who experienced excessive myopic regression which resulted in more myopia after excimer laser surgery.
Methods:
All patients, white males, 31 to 35 years old, were treated with the VISX 20/20 excimer laser.
Results:
Patient 1 had a manifest refraction of -5.00 diopters before PRK and 9 months later it was -4.25 +0.50 x 65º. Six months after retreatment it was -6.00 diopters and the patient had a corneal haze grade 3. Patient 2 had a manifest refraction of -12.25 +2.25 x 10º before surgery and -14.25 +1.00x 105º after wards with a corneal haze grade 3. Patient 3 had a manifest refraction of -5.75 +0.25 x 25º and four months after surgery it was -6.25 with a corneal haze grade 2.
Conclusion:
The corneal healing process after excimer is notwell understood and patients should be informed about the remote possibility that their myopia may increase after PRK and that they may develop a significanthaze.
Key words:
Excimer laser; Myopia; Haze
Resumo
Objetivo:
Apresentar três pacientes que tiveram excessiva regressão após ceratectomia fotorrefrativa resultando em mais miopia no período pós-operatório.
Método:
Todos os pacientes eram brancos, masculinos com idades entre 31 e 35 anos e foram tratados com o VISX 20/20 excimer laser.
Resultados:
Caso 1 tinha uma refração dinâmica de -5,00 dioptrias antes da cirurgia e -4,25 +0,50 x 65º nove meses depois. Foi submetido a retratamento e após seis meses sua refração era de -6,00 dioptrias com haze corneano grau 3. Caso 2 tinha -12,25 +2,25 x 10º antes da cirurgia e -14,25 + 1,00 x 105º cinco meses depois com haze grau 3. Paciente 3 tinha -5,75 +0,25 x 25º antes da cirurgia e -6,25 dioptrias quatro meses mais tarde com haze grau 2.
Conclusão:
Pelo fato do processo de cicatrização corneano após PRK não ser ainda bem compreendido e controlável, os pacientes devem ser informados que esta cirurgia pode levar a um aumento da miopia.
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REFERENCES
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Publication Dates
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Publication in this collection
Apr 1998