Resumen de Queratomileusis in situ asistida por el láser LadarVision 4000. Resultados

Alfredo Amigó Rodríguez, E. Aja Hoyos, M. Romero Insúa

• Objective: To present the results obtained with the LADARVision active tracking narrow beam excimer laser system using laser in situ keratomileusis (LASIK) for correction of myopia and hyperopia with or without astigmatism.

  Material and methods: The study was performed over a serie of 483 eyes, 435 were myopes with or without astigmatism with a spherical equivalent (SE) up to ¿11.0 D and astigmatism up to ¿5.5 D and 48 were hyperopes with a SE up to 4.0 D and a cylindrical component up to ¿5.5 D. Treatments were performed in myopes by using an optic zone between 6.0 and 7.0 mm and a transition zone between 1.0 and 1.5 mm for astigmates. In hyperopes the optic zone varied between 6.5 and 7.0 mm and transition zone between 1.0 and 1.5 mm. Visual acuity, subjective refraction, complications and adverse reactions were measured.

  Results: Results at the third post-operative month were obtained in 233 myopes eyes and 30 hyperopes. For myopes with or without astigmatism, uncorrected visual acuity (UCVA) was 20/20 or better in 69.8%, 20/25 or better in 86.5% and 20/40 or better in 100%. Mean SE was 0.08±0.62 D (¿2.0\ 1.88). No eyes lost greater than two lines of vision. For hyperopes eyes with or without astigmatism, UCVA was 20/20 or better in 51.7%, 20/25 or better in 75.9% and 20/40 or better in 100.0%; mean SE was -0.04±0.67 D (-0.87\ 1.50). No eyes lost two or more than two lines of BCVA.

  Conclusions: Eyes treated for myopia up to ¿11 D of spherical equivalent with or without astigmatism up to ¿5.5 D and hyperopes eyes up to 4.0 D of spherical equivalent and astigmatism up to ¿5.5 D, showed good visual results with no correction, non significant loss of BCVA, accurate correction of astigmatism, and slight necessity of modifying the photorefractive keratectomy algorithm in order to avoid hypocorrections with a single treatment.