Estudo do segmento anterior com a câmera rotatória de Scheimpflug em pacientes candidatos à cirurgia refrativa

Murata, Celina; Mallmann, Felipe; Yamazaki, Ester Sakae; Campos, Mauro

doi:10.1590/s0004-27492007000400012

Cited by 6 publications

(6 citation statements)

References 22 publications

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“…Our results on the association between deeper anterior chamber, higher chamber volume, wider chamber angles, and myopia concur with previous studies on other ethnic populations 222930. These data further explain why hyperopia is a predominant risk factor for a primary angle-closure glaucoma 31.…”

Section: Discussionsupporting

confidence: 92%

“…Among the different subgroups of myopic eyes in the current study, higher ACD, and ACV measurements were found in low myopic eyes. These outcomes are similar to findings reported by Murata et al .,22 who reported a shallower anterior chamber in highly myopic eyes (>–9 D). However, Uçakhan et al .,14 reported significantly higher ACD and ACV measurements in the high myopic group.…”

Section: Discussionsupporting

confidence: 91%

“…Studies that attempted to evaluate the effect of refractive errors, in particular degree of myopia on the central corneal thickness show conflicting results 14222324. In contrast to Murata et al .,22 and similar to those reported by Uçakhan et al .,14 we found there was no significant difference between hyperopic and myopic CT measurements ( P > 0.05). Although the thinnest CT measurements were lower in high myopic eyes, the difference was not statistically significant ( P > 0.05).…”

Section: Discussionsupporting

confidence: 56%

“…Values outside the accepted normal range may suggest that the patient is a poor candidate for refractive surgery or that further evaluation is warranted before undergoing a refractive procedure 2021. Studies that attempted to evaluate the effect of refractive errors, in particular degree of myopia on the central corneal thickness show conflicting results 14222324. In contrast to Murata et al .,22 and similar to those reported by Uçakhan et al .,14 we found there was no significant difference between hyperopic and myopic CT measurements ( P > 0.05).…”

Section: Discussionmentioning

confidence: 99%

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Anterior segment study with the pentacam scheimpflug camera in refractive surgery candidates

Hashemi

Falavarjani

Aghai

et al. 2013

Middle East Afr J Ophthalmol

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Purpose:The purpose of this study was to evaluate the anterior segment measurements according to refractive status in a sample of the Iranian population.Setting:Rassoul Akram Hospital, Tehran University of Medical Sciences.Material and Methods:In this study, refractive surgery candidates were assigned according to the refractive error to one of three groups : emmetropia, myopia, and hyperopia. Myopic eyes were further divided to four subgroups : simple myopic group, simple myopic astigmatism group, high myopic group, and high myopia with astigmatism group. Anterior segment measurements with the Pentacam Scheimpflug system were performed in the right eye of all subjects.Results:The study sample was comprised of 283 subjects with a mean age of 29.1 ± 7.5 (standard deviation) years. Mean keratometry reading, Anterior chamber depth (ACD) and volume measurements were significantly higher in the myopic group and mean keratometry reading and anterior chamber angle measurements were significantly lower in the hyperopic group (P < 0.05, all comparisons). Maximum anterior elevation (AEmax) and maximum posterior elevation (PEmax), Q value, progression index, minimum corneal thickness, and corneal volume measurements were similar for all groups (P > 0.05, all comparisons). In the myopic subgroups, AEmax and PEmax and maximum keratometry (Kmax) were significantly higher, and ACD was lower in the astigmatic groups (P < 0.05, all comparisons). The Q value was less negative in low myopia (P < 0.05).Conclusions:Myopic eyes had steeper corneas than hyperopic eyes and anterior chamber measurements were significantly higher in the myopic eyes. In myopic eyes, AEmax and PEmax and Kmax measurements were higher, and ACD measurements were lower in the astigmatic groups.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 56%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Anterior segment study with the pentacam scheimpflug camera in refractive surgery candidates

Hashemi

Falavarjani

Aghai

et al. 2013

Middle East Afr J Ophthalmol

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“…Our findings indicated the mean anterior chamber depth and volume in myopic individuals is more than other two types, which supported by Rabsilber et al (2006) and Murata et al (2007). As a result, it seems hyperopia and emmetropia individuals are high risk for primary angle-closure glaucoma (Hashemi et al, 2013).…”

Section: Discussionsupporting

confidence: 61%

Anterior Segment Eye Assessment of Refractive Surgery Candidates in the Southeast of Iran

Nakhjavanpour¹,

Payandeh²,

rajabi³

et al. 2016

GJHS

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Anterior segment eye parameters are essential factors in diagnosis, screening and management of abnormal ocular conditions. Based on the previous studies, they might differ from one race or population to another. Sistan-and-Baluchestan province, the southeast of Iran, has special weather conditions and race, plus lack of research on these diagnostic factors. Hence, the objective of the present study was to assess anterior segment parameters using pentacam in this area. 800 eyes of subjects which had been referred to the Al-Zahra eye hospital of Zahedan, the capital city of the province, for corneal refractive surgery from October 2014 to March 2015 participated in this research. 95% confidence limits for mean of central corneal thickness, anterior chamber depth and volume were (536.02, 541.20), (3.13, 3.18) and (187.63, 192.58) respectively. Multiple linear regression models showed a lower mean central corneal thickness, and maximum/minimum of keratometry, for males than females, adjusting for age and spherical equivalent. Inversely, anterior chamber depth, and volume were more in males. In order to diagnosis and treating ocular diseases which have effect on retinal thickness, precisely specification of predictive factors is highly needed.

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Pentacam Indices in Photorefractive Keratectomy Surgery

et al. 2020

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Refractive eye surgeries are one of the most non-emergent ophthalmic surgeries due to the effect on the reduction of refractive errors, increasing visual acuity, enhancing the quality of vision, and indirectly increasing the quality of life of patients. The aim of this study was to determine Pentacam indices in the patients who underwent photorefractive keratectomy (PRK) during 2014-2018, as well as to show their correlation with the type of refractive error. This descriptive cross-sectional study was performed on 2215 eyes of 1125 patients undergoing PRK surgery. The patients’ checklist, including demographic information, refractive index, keratometry, pachymetry, corneal surface zone indices, and progressive corneal thickness indices, was provided. All data were analyzed using the IBM SPSS software, version 25. The findings showed that there was a significant association between posterior corneal astigmatism (PCA) and anterior corneal astigmatism (ACA) (p=0.00). The mean Kmax front was recorded as 44.844 ± 1.58 D, which was significantly correlated with the type of refractive errors (p=0.00). According to the findings, there was a significant relationship between anterior chamber indices and refractive error types and their severity (p=0.00). There was also a significant correlation between the surface zone and keratoconus indices (i.e., index of surface variance - ISV, index of vertical asymmetry - IVA, index of height asymmetry - IHA, and minimum radius of curvature - Rmin) with refractive errors (p=0.00). The findings showed that some of the Pentacam indices could be related to the types of refractive errors in patients undergoing PRK surgery. Therefore, their evaluation is of great importance in this regard.

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Estudo do segmento anterior com a câmera rotatória de Scheimpflug em pacientes candidatos à cirurgia refrativa

Abstract: We observed in this study that patients with myopia had lesser mean corneal volume and pachymetry, and greater anterior chamber depth and volume compared with hyperopic patients.

Cited by 6 publications

References 22 publications

Anterior segment study with the pentacam scheimpflug camera in refractive surgery candidates

Anterior segment study with the pentacam scheimpflug camera in refractive surgery candidates

Anterior Segment Eye Assessment of Refractive Surgery Candidates in the Southeast of Iran

Pentacam Indices in Photorefractive Keratectomy Surgery

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