Effect of Larger Ablation Zone and Transition Zone on Corneal Optical Aberrations After Photorefractive Keratectomy

Night vision disturbances after successful LASIK surgery

“…14 Despite association between pupil size and ocular aberrations, which is in agreement with the findings of previous studies, [15][16][17] pupil size, when considered alone, was not a significant contributor to HDI in the present study. Moreover, looking at average values of pupil size presurgery and postsurgery, there was a slight decrease from 6.27 to 6.16 mm.…”

Night vision disturbances after successful LASIK surgery

“…14 Despite association between pupil size and ocular aberrations, which is in agreement with the findings of previous studies, [15][16][17] pupil size, when considered alone, was not a significant contributor to HDI in the present study. Moreover, looking at average values of pupil size presurgery and postsurgery, there was a slight decrease from 6.27 to 6.16 mm.…”

Comparison of aberrations after standard and customized refractive surgery

“…Because an abrupt change in corneal curvature may induce excessive epithelial and the haze may be confined to the wound edge, the transition zone must be included in the modern refractive surgery. Corneal postoperative optical aberrations with a larger ablation zone including transition zone were less pronounced than those associated with no transition zone [33]. Additionally, our results demonstrated that the ablation profile with transition zone may account for a main portion of the increase of postoperative higherorder aberrations, especially coma and spherical aberrations [34,35].…”

Conservation of corneal tissue with wavefront-guided laser in situ keratomileusis

“…Bullimore and coauthors 6 report the benefits of a larger ablation zone with respect to contrast sensitivity. Endl et al 5 express similar opinions regarding a smaller increase of ocular aberration in the case of a larger ablation zone. With current refractive surgery, it is reasonable to adjust the optical ablation zone based on individual pupil size.…”

Night vision disturbances after successful LASIK surgery

“…14 Despite association between pupil size and ocular aberrations, which is in agreement with the findings of previous studies, [15][16][17] pupil size, when considered alone, was not a significant contributor to HDI in the present study. Moreover, looking at average values of pupil size presurgery and postsurgery, there was a slight decrease from 6.27 to 6.16 mm.…”

Comparison of aberrations after standard and customized refractive surgery

“…Because an abrupt change in corneal curvature may induce excessive epithelial and the haze may be confined to the wound edge, the transition zone must be included in the modern refractive surgery. Corneal postoperative optical aberrations with a larger ablation zone including transition zone were less pronounced than those associated with no transition zone [33]. Additionally, our results demonstrated that the ablation profile with transition zone may account for a main portion of the increase of postoperative higherorder aberrations, especially coma and spherical aberrations [34,35].…”

Conservation of corneal tissue with wavefront-guided laser in situ keratomileusis

“…Bullimore and coauthors 6 report the benefits of a larger ablation zone with respect to contrast sensitivity. Endl et al 5 express similar opinions regarding a smaller increase of ocular aberration in the case of a larger ablation zone. With current refractive surgery, it is reasonable to adjust the optical ablation zone based on individual pupil size.…”

Night vision disturbances after successful LASIK surgery

“…14 Despite association between pupil size and ocular aberrations, which is in agreement with the findings of previous studies, [15][16][17] pupil size, when considered alone, was not a significant contributor to HDI in the present study. Moreover, looking at average values of pupil size presurgery and postsurgery, there was a slight decrease from 6.27 to 6.16 mm.…”

Comparison of aberrations after standard and customized refractive surgery

“…Because an abrupt change in corneal curvature may induce excessive epithelial and the haze may be confined to the wound edge, the transition zone must be included in the modern refractive surgery. Corneal postoperative optical aberrations with a larger ablation zone including transition zone were less pronounced than those associated with no transition zone [33]. Additionally, our results demonstrated that the ablation profile with transition zone may account for a main portion of the increase of postoperative higherorder aberrations, especially coma and spherical aberrations [34,35].…”

Conservation of corneal tissue with wavefront-guided laser in situ keratomileusis

“…Bullimore and coauthors 6 report the benefits of a larger ablation zone with respect to contrast sensitivity. Endl et al 5 express similar opinions regarding a smaller increase of ocular aberration in the case of a larger ablation zone. With current refractive surgery, it is reasonable to adjust the optical ablation zone based on individual pupil size.…”