Wavefront analysis and Zernike polynomial decomposition for evaluation of corneal optical quality

Oliveira, Cristina; Ferreira, Andreia; Franco, Sandra

doi:10.1016/j.jcrs.2011.11.016

Cited by 53 publications

(42 citation statements)

References 116 publications

(153 reference statements)

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“…This approach gives the clinician better information about the image-forming optical properties of the studied eye. [26][27][28] In our study, two different image quality metrics, Strehl ratio and MTF, were used to characterize visual function of patients with diabetes. Compared with control subjects, both the ocular and internal Strehl ratio and MTF calculated for HO aberrations were worse in the DME group.…”

Section: Discussionmentioning

confidence: 99%

Ocular Wavefront Aberrations and Optical Quality in Diabetic Macular Edema

Miháltz

Kovács

Weingessel

et al. 2016

Retina

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Section: Discussionmentioning

confidence: 99%

Ocular Wavefront Aberrations and Optical Quality in Diabetic Macular Edema

Miháltz

Kovács

Weingessel

et al. 2016

Retina

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“…Unlike other studies, we sought to evaluate aberrometry under conditions of mesopic pupil in an attempt to detect the manifestation of wavefront function under physiological conditions without the use of pharmacological mydriasis (13) . The following variables were collected: (1) total aberration, (2) high-order spherical aberration, (3) tilt, (4) coma, and (5) Strehl ratio (8,9) . Finally, the visual monocular defocus curve was evaluated in long-distance visual acuity, corrected using the same ETDRS chart at a distance of 4 m, at intervals of 0.50 spherical diopters from -5.00 to +2.50 D (21) .…”

Section: Methodsmentioning

confidence: 99%

“…The addition promoted by the lens, whether it is +2.5 diopters (D), +3.0 D, or +4.0 D, influences the best reading distance and depth of focus. These different compositions culminate in distinctly different optical aberrometric behaviors (8)(9)(10) . In this study, we compared visual parameters, optical performance, contrast sensitivity (CS), and wavefront analysis results between two different types of multifocal lenses currently available in the market: AcrySof® IQ ReSTOR® Multifocal IOL SN6AD1 (Alcon Laboratories, Inc., Irvine, CA, USA) and AMO Tecnis® ZMB00 (Abbott Medical Optics, Santa Ana, CA, USA).…”

Section: Multifocal Iol Sn6ad1mentioning

confidence: 99%

Comparative study on optical performance and visual outcomes between two diffractive multifocal lenses: AMO Tecnis® ZMB00 and AcrySof® IQ ReSTOR® Multifocal IOL SN6AD1

Chaves¹,

Hida²,

Tzeliks³

et al. 2016

Arquivos Brasileiros De Oftalmologia

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Purpose: To compare the optical performance and visual outcomes between two diffractive multifocal lenses: AMO Tecnis® ZMB00 and AcrySof® ReSTOR® SN6AD1. Methods: This prospective, non-randomized comparative study included the assessment of 74 eyes in 37 patients referred for cataract surgery and candidates for multifocal intraocular lens implants. Exclusion criteria included existence of any other eye disease, previous eye surgery, high axial myopia, preoperative corneal astigmatism of >1.00 cylindrical diopter (D), and intraoperative or postoperative complications. Ophthalmological evaluation included the measurement of uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), distance-corrected near visual acuity (DCNVA), and distance-corrected intermediate visual acuity (DCIVA), with analysis of contrast sensitivity (CS), wavefront, and visual defocus curve. Results: Postoperative UDVA was 0.09 and 0.08 logMAR in the SN6AD1 and ZMB00 groups, respectively (p=0.868); postoperative CDVA was 0.04 and 0.02 logMAR in the SN6AD1 and ZMB00 groups, respectively (p=0.68); DCIVA was 0.17 and 0.54 logMAR in the SN6AD1 and ZMB00 groups, respectively (p=0.000); and DCNVA was 0.04 and 0.09 logMAR in the SN6AD1 and ZMB00 groups, respectively (p=0.001). In both cases, there was an improvement in the spherical equivalent and UDVA (p<0.05). Under photopic conditions, the SN6AD1 group had better CS at low frequencies without glare (p=0.04); however, the ZMB00 group achieved better sensitivity at high frequencies with glare (p=0.003). The SN6AD1 and ZMB00 lenses exhibited similar behavior for intermediate vision, according to the defocus curve; however, the ZMB00 group showed a shorter reading distance than the SN6AD1 group. There were no significant differences regarding aberrometry between the two groups. Conclusion: Both lenses promoted better quality of vision for both long and short distances and exhibited a similar behavior for intermediate vision. The SN6AD1 and ZMB00 groups showed better results for CS under photopic conditions at low and high spatial frequencies, respectively. Keywords

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“…The 'Wavefront Aberration Cornea' data of the Pentacam's Zernike analysis was used. The selected refractive indices were 1.376 and 1.336 for the cornea and the aqueous, respectively [23]. The HOA data were analyzed quantitatively in the central 4-mm pupil diameter up to the sixth order by expanding the set of Zernike polynomials.…”

Section: Methodsmentioning

confidence: 99%

Higher Order Aberrations of the Corneal Surface after Laser Subepithelial Keratomileusis

Jung

et al. 2014

Korean J Ophthalmol

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PurposeTo evaluate the changes of higher order aberrations (HOAs) before and after laser subepithelial keratomileusis (LASEK) and to analyze the influence of tear film instability on HOAs of the corneal surface after LASEK.MethodsIn this cross-sectional study, 31 patients who underwent LASEK were divided into dry eye (16 patients, 32 eyes) and non-dry eye groups (15 patients, 30 eyes). Uncorrected distance visual acuity, spherical equivalent refraction, ablation depth, tear film parameters and Ocular Surface Disease Index (OSDI) questionnaire scores were evaluated in both groups. Total HOA root mean square (RMS), third-order coma, third-order trefoil and fourth-order spherical aberration (SA) of the corneal surface immediately and at 10 seconds after blinking were measured before and after surgery.ResultsThe total HOA RMS, coma, trefoil and SA significantly increased after LASEK compared with preoperative values in both groups. In the dry eye group, total HOA RMS, coma and trefoil significantly increased except for SA at 10 seconds after blinking compared with those measured immediately after blinking. In addition, the changes of total HOA RMS, coma and trefoil were negatively correlated with tear film break-up time (R = -0.420, -0.473 and -0.439, respectively), but positively correlated with OSDI score (R = 0.433, 0.499 and 0.532, respectively). In the non-dry eye group, there were no significant differences between HOAs measured at 10 seconds after blinking and those measured immediately after blinking.ConclusionsThe HOAs including coma, trefoil and SA significantly increased after LASEK. The tear film instability in the dry eye can be associated with more deterioration of the optical quality after LASEK, due to more significant increase of total HOA RMS, coma and trefoil.

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Wavefront analysis and Zernike polynomial decomposition for evaluation of corneal optical quality

Cited by 53 publications

References 116 publications

Ocular Wavefront Aberrations and Optical Quality in Diabetic Macular Edema

Ocular Wavefront Aberrations and Optical Quality in Diabetic Macular Edema

Comparative study on optical performance and visual outcomes between two diffractive multifocal lenses: AMO Tecnis® ZMB00 and AcrySof® IQ ReSTOR® Multifocal IOL SN6AD1

Higher Order Aberrations of the Corneal Surface after Laser Subepithelial Keratomileusis

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