Comparison of corneal wavefront aberrations after photorefractive keratectomy and laser in situ keratomileusis

Oshika, Tetsuro; Klyce, Stephen D.; Applegate, Raymond A.; Howland, Howard C.; Danasoury, M.Alaa El

doi:10.1016/s0002-9394(98)00288-8

Cited by 404 publications

(200 citation statements)

References 14 publications

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“…31 Oshika et al described that third-and fourth-order RMS in 7-mm pupils were 0.883 and 1.455 after photorefractive keratectomy, respectively, and those after laser in situ keratomileusis were 1.436 and 1.941, respectively. 23 The amount of HOAs after scleral buckling surgery was similar to that after cataract surgery and lower than that after excimer laser refractive surgery. Thus, the increase in HOAs after scleral buckling surgery may be less important than other anatomical and functional factors with regard to visual function.…”

Section: Discussionmentioning

confidence: 73%

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Changes in Higher-Order Aberrations after Scleral Buckling Surgery for Rhegmatogenous Retinal Detachment

et al. 2008

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Design: Prospective observational comparative case series. Participants:The study included 67 eyes of 67 RD patients undergoing scleral buckling surgery, and the fellow normal eyes comprised the control group.Twenty-seven eyes were treated with segmental buckling procedure and 40 eyes received encircling buckling procedure alone. Methods:Hartmann-Shack wavefront analysis was performed at 2 weeks, 1 month, and 3 months postoperatively. Main Outcome Measures: Time course of changes in HOAs.Results: The scleral buckling surgery significantly increased HOAs at 2 weeks (p <

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Section: Discussionmentioning

confidence: 73%

“…The RMS of third-and fourth-order Zernike components (Z 3 -3 to Z 3 3 , Z 4 -4 to Z 4 4 , respectively) were used to represent coma-and spherical-like aberrations, respectively. [20][21][22][23][24] …”

Section: Measurement Of Hoasmentioning

confidence: 99%

Changes in Higher-Order Aberrations after Scleral Buckling Surgery for Rhegmatogenous Retinal Detachment

et al. 2008

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“…[15][16][17][18][19] Letter-contrast sensitivity was measured with CSV-1000LV chart (Vector Vision, Columbus, OH, USA). This instrument uses letter optotypes all of which were the same size and of low spatial frequency (2.4 cycle/1).…”

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confidence: 99%

Higher-order wavefront aberration and letter-contrast sensitivity in keratoconus

Okamoto

Samejima

et al. 2007

Eye

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Aims To evaluate the relation between higher-order aberration of the eye and contrast sensitivity function in eyes with keratoconus. Methods In 22 eyes of 14 patients with keratoconus (age 30.578.4 years, means7SD) and 26 eyes of 13 normal controls (age 29.276.7 years), ocular higher-order wavefront aberration for a 6-mm pupil was measured with the Hartmann-Schack aberrometer (KR-9000 PW, Topcon). The root mean square (RMS) of third-and fourth-order Zernike coefficients was used to represent higher-order aberrations. The letter-contrast sensitivity was examined using the CSV-1000LV contrast chart (Vector Vision). Results In the keratoconus group, the letter-contrast sensitivity showed significant correlation with third-order (Spearman's correlation coefficient r ¼ À0.736, Po0.001) and fourth-order aberrations (r ¼ À0.464, Po0.05). There was borderline correlation between log MAR BSCVA and third-order (r ¼ 0.413, P ¼ 0.070) and fourth-order aberrations (r ¼ 0.394, P ¼ 0.086). In the normal group, the letter-contrast sensitivity had no significant correlation with third-order (r ¼ À0.170, P ¼ 0.411) and fourth-order aberrations (r ¼ À0.088, P ¼ 0.673), and log MAR best spectacle-corrected visual acuity (BSCVA) showed no correlation with third-order (r ¼ 0.063, P ¼ 0.762) and fourth-order aberrations (r ¼ À0.282, P ¼ 0.165). Conclusions In eyes with keratoconus, there is significant correlation between contrast sensitivity and ocular higher-order wavefront aberrations.

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“…Although higher-order aberrations (HOAs) make a small contribution (r10%) to the overall wave aberration in the eye, 71 some authors have shown a large effect of degradation in the quality of the retinal image and affect visual acuity. 72 There are factors that may contribute to the change in aberrations, such as ageing, [73][74][75][76][77] accommodation, 78 photoreceptors, 73 pupil size, 71,[79][80][81][82] refractive surgery, 76,[83][84][85] and tear film. 86,87 Even though there are no studies evaluating the impact that these factors could have on HOAs in people with DM, these do have a thicker and more convex lens, [54][55][56] can develop premature cataracts, [9][10][11] and suffer a series of changes associated with lachrymal gland dysfunction and dry eye syndrome.…”

Section: Aberrationsmentioning

confidence: 99%

Optical quality of the diabetic eye: a review

Calvo-Maroto

Pérez-Cambrodí²,

Albarán-Diego

et al. 2014

Eye

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Diabetes mellitus is a metabolic disorder characterized by the presence of chronic hyperglycaemia. Several structural, morphological, and physiological changes in each of ocular component have been described in detail during the past decades. Due to these abnormalities, the diabetic patient undergoes a degradation of the retinal image by an increase of higher ocular aberrations and ocular scattering coming from mainly tear film, cornea, and crystalline lens. This review aims to provide an overview of current knowledge about the effects of diabetes mellitus in these optical phenomena and its consequence on the visual quality of the diabetic patient.

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Comparison of corneal wavefront aberrations after photorefractive keratectomy and laser in situ keratomileusis

Cited by 404 publications

References 14 publications

Changes in Higher-Order Aberrations after Scleral Buckling Surgery for Rhegmatogenous Retinal Detachment

Changes in Higher-Order Aberrations after Scleral Buckling Surgery for Rhegmatogenous Retinal Detachment

Higher-order wavefront aberration and letter-contrast sensitivity in keratoconus

Optical quality of the diabetic eye: a review

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