Overestimation of corneal endothelial cell density by automated method in glaucomatous eyes with impaired corneal endothelial cells

Specular Microscopy ◽

Cell Parameters ◽

Automated Method ◽

Automated Methods

Abstract Purpose To determine between-method differences in corneal endothelial cell parameters using center and automated methods of non-contact specular microscopy (CellCheck software of Konan, Inc.) in glaucomatous eyes. Methods We analyzed the central corneal endothelial cell density (ECD) of 245 glaucomatous eyes using center (ECD-Ce) and automated methods (ECD-Au). Based on the ECD-Ce, we allocated subjects to Groups 1 to 10 (at 250 cells/mm2 intervals) and evaluated the ECD, coefficient of variation in cell area (CV), and percentage of hexagonal cells (HEX). Results There was a close correlation (r = 0.91) between the ECD values measured using both methods. However, ECD-Au were significantly higher than those measured by the center method when ECD-Ce was less than 2500 (in Groups 1 to 8; P < 0.001 to P = 0.006). The regression equation of (ECD-Au—ECD-Ce) = 1028–0.397*ECD-Ce shows greater deviation in eyes with lower ECD, and this difference became 0 when ECD -Ce was 2593 cells/mm2. None of the 44 subjects with an ECD-Ce of < 1000 cells/mm2 recorded an ECD-Au < 1000 cells/mm2. Compared with the center method, the automated method had higher and lower median CV and HEX values, respectively (P < 0.001). The between-method differences in both CV and HEX were negatively correlated with ECD-Ce (r = −0.49, P < 0.001 and r = −0.25, P < 0.001, respectively). Conclusion The automated method of the CellCheck software overestimates ECD in eyes with lower ECD values and may overlook risk of corneal decompensation.

Overestimation of Corneal Endothelium Cell Density by Automated Method in Eyes with Impaired Corneal Endothelial Cells

10.21203/rs.3.rs-545306/v1 ◽

2021 ◽

Author(s):

Mayumi Minami ◽

Etsuo Chihara

Keyword(s):

Cell Density ◽

Corneal Endothelium ◽

Close Correlation ◽

Specular Microscopy ◽

Corneal Endothelial Cells ◽

Cell Parameters ◽

Automated Method ◽

Corneal Decompensation ◽

Automated Methods

Abstract Purpose: To determine between-method differences in corneal endothelial cell parameters using center and automated methods of non-contact specular microscopy (CellCheck software of Konan, Inc.).Methods: We analyzed the central corneal endothelium cell density (ECD) of 245 glaucomatous eyes using center (ECD-Ce) and automated methods (ECD-Au). Based on the ECD-Ce, we allocated subjects to Groups 1 to 10 (at 250 cells/mm2 intervals) and evaluated the ECD, coefficient of variation of cell area (CV), and percentage of hexagonal cells (HEX).Results: There was a close correlation (r = 0.91) between the ECD values measured using both methods. However, ECD-Au were significantly higher than those measured by the center method when ECD-Ce was less than 2500 (in Groups 1 to 8; P < 0.001 to P = 0.006). The regression equation of (ECD-Au - ECD-Ce) =1028-0.397*ECD-Ce shows greater deviation in eyes with lower ECD, and this difference became 0 when ECD -Ce was 2593 cells/mm2. None of the 44 subjects with an ECD-Ce of < 1000 cells/mm2 recorded an ECD-Au < 1000 cells/mm2. Compared with the center method, the automated method had higher and lower median CV and HEX values, respectively (P < 0.001). The between-method differences in both CV and HEX were negatively correlated with ECD-Ce (r = -0.49, P < 0.001 and r = -0.25, P < 0.001; respectively).Conclusion: The automated method of the CellCheck software overestimates ECD in eyes with lower ECD values and may overlooks risk of corneal decompensation.

Comparison of manual & automated analysis methods for corneal endothelial cell density measurements by specular microscopy

Journal of Optometry ◽

10.1016/j.optom.2017.06.001 ◽

2018 ◽

Vol 11 (3) ◽

pp. 182-191 ◽

Cited By ~ 6

Author(s):

Jianyan Huang ◽

Jyotsna Maram ◽

Tudor C. Tepelus ◽

Cristina Modak ◽

Ken Marion ◽

...

Keyword(s):

Endothelial Cell ◽

Cell Density ◽

Automated Analysis ◽

Specular Microscopy ◽

Density Measurements ◽

Analysis Methods ◽

Corneal Endothelial Cell Density

Corneal endothelial cell density and pachymetry measured by contact and noncontact specular microscopy

Journal of Cataract & Refractive Surgery ◽

10.1016/s0886-3350(02)01296-8 ◽

2002 ◽

Vol 28 (10) ◽

pp. 1763-1769 ◽

Cited By ~ 42

Author(s):

László Módis ◽

Achim Langenbucher ◽

Berthold Seitz

Keyword(s):

Endothelial Cell ◽

Cell Density ◽

Specular Microscopy ◽

Corneal Endothelial Cell Density

Corneal Endothelial Cell Density and Morphology in Healthy Egyptian Eyes

Journal of Ophthalmology ◽

10.1155/2019/6370241 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Marwa Mahmoud Abdellah ◽

Hatem Gamal Ammar ◽

Mohamed Anbar ◽

Engy Mohammed Mostafa ◽

Mahmoud Mohamed Farouk ◽

...

Keyword(s):

Endothelial Cell ◽

Cell Density ◽

Corneal Thickness ◽

Corneal Transplantation ◽

Specular Microscopy ◽

Cell Area ◽

The Mean

Purpose. To evaluate the corneal endothelial cell density and morphology in normal Egyptian eyes. Methods. In total, 568 healthy eyes of 568 Egyptian volunteers aged 20 to 85 years were examined using noncontact specular microscopy for the central corneal thickness (CCT), mean endothelial cell density (MCD), coefficient of variation (CV) in cell area, mean cell area (MCA), and hexagonal cell (Hex) percentage. Variables were compared between sexes and between different age groups. Results. The mean CCT, MCD, and MCA were 514.45 ± 43.04 μm, 2647.50 ± 382.62 cells/mm2, and 390.59 ± 149.94 μm2, respectively. MCD and MCA showed no significant differences between men and women (P=0.171 and 0.099, respectively), whereas CV (%) and Hex (%) showed significant differences (P=0.024 and 0.015, respectively). CCT (P=0.007, r = −0.113) and MCD (P<0.001, r = −0.357) exhibited a significant negative correlation with age, whereas CV (%) (P<0.001, r = 0.341) and MCA (P=0.008, r = 0.111) exhibited a significant positive correlation. The mean rate of endothelial cell loss from 20 to 85 years of age was 0.3% per year. Conclusions. Our results provide normative data for the corneal endothelium in healthy Egyptian eyes, thus increasing the knowledge base for corneal endothelial cell parameters in healthy Egyptian eyes. Furthermore, our findings can be used as baseline values for comparisons between Egyptian and other populations and for studies of the endothelial cell reserve and capacity for intraocular surgery and corneal transplantation.

Corneal endothelial cell density and morphology in rabbits’ eyes using contact specular microscopy

Ciência Rural ◽

10.1590/0103-8478cr20170027 ◽

2017 ◽

Vol 47 (12) ◽

Author(s):

Gustavo Brambatti ◽

Luciane de Albuquerque ◽

Eduarda Valim Borges de Vargas ◽

Carolina Fonseca Neumann ◽

João Antonio Tadeu Pigatto

Keyword(s):

Endothelial Cell ◽

Cell Density ◽

Specular Microscopy ◽

Group I ◽

Males And Females ◽

The Mean ◽

Age Range

ABSTRACT: The goal of this study was to describe the normal values of corneal endothelial cell density and hexagonality in healthy rabbits’ eyes using contact specular microscopy. Both eyes of 18 rabbits, males and females, of different ages were evaluated. The eyes were divided into three groups of 12 each according to the age range of the animals: G1 (6 months old), G2 (12 months old), and G3 (48 months old). Parameters studied included mean endothelial cell density and hexagonality. For Group I, the mean cell density was 2307 cells per mm2. For GII, the mean cell density was 1895 cells per mm2. For G III, the mean cell density was 1818 cells per mm2. Cell density decreased significantly with aging (P<0.001) among the three groups. Pleomorphism in the rabbits of GI was 74.33±10.08. In the rabbits of GII it was 71.83±11.38. In the rabbits of GIII it was 64.02±28.80. Significant differences (P<0.001) were evident between GI and GIII and GII and GIII but not between Groups I and II. The results showed a decrease in number of cells and hexagonality with aging. Corneal endothelium of rabbits suffers changes due to advancing age both in terms of cell density and morphology.

Myopia, corneal endothelial cell density and morphology in a Japanese population-based cross-sectional study: the JPHC-NEXT Eye Study

Scientific Reports ◽

10.1038/s41598-021-85617-4 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Naohiko Aketa ◽

Miki Uchino ◽

Motoko Kawashima ◽

Yuichi Uchino ◽

Kenya Yuki ◽

...

Keyword(s):

Endothelial Cell ◽

Cell Density ◽

Contact Lenses ◽

Population Based ◽

Cross Sectional Study ◽

Sectional Study ◽

Cross Sectional ◽

Corneal Endothelial Cell Density

AbstractThis population-based cross-sectional study was performed to determine the mean corneal endothelial cell density (ECD), coefficient of variation (CV), and hexagonality (HEX), and their associations with myopia in Japanese adults living in Chikusei city. Of 7109 participants with available data, 5713 (2331 male and 3382 female) participants were eligible for analysis. After assessing the relationship between participant characteristics and spherical equivalent refraction (SER), the association of SER with the abnormal value of ECD (< 2000 cells/mm), CV (≥ 0.40), and HEX (≤ 50%) were determined using the logistic regression models adjusting for potential confounders (age, intraocular pressure, keratometric power, height, and antihypertensive drug use). In male participants, there was no statistically significant relationships between SER and endothelial parameters. In female participants, compared to emmetropia, SER ≤ − 6 D had significantly higher odds ratio (OR) of having the abnormal value of CV (OR = 2.07, 95% confidence interval [CI] 1.39–3.10) and HEX (OR = 2.04, 95% CI 1.29–3.23), adjusted for potential confounders, indicating that the high myopia was associated with the abnormal values of CV and HEX. Further adjustment for contact lenses wear partly attenuated these associations. Association between the SER and ECD was not detected.

27-gauge trocar-assisted sutureless intraocular lens fixation

BMC Ophthalmology ◽

10.1186/s12886-020-01758-6 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Tatsuya Jujo ◽

Jiro Kogo ◽

Hiroki Sasaki ◽

Reio Sekine ◽

Keiji Sato ◽

...

Keyword(s):

Visual Acuity ◽

Endothelial Cell ◽

Cell Density ◽

Intraocular Lens ◽

Vitreous Hemorrhage ◽

The Mean ◽

Iol Fixation

Abstract Backgrounds However there have been numerous investigations of intrascleral intraocular lens (IOL) fixation techniques, there is room for improvement in terms of simplifying complicated techniques and reducing the high levels of skill required. This study aimed to report a novel technique for sutureless intrascleral fixation of the IOL using retinal forceps with a 27-gauge trocar. Methods Nineteen eyes of 18 patients underwent intrascleral fixation of the IOL from July 2018 to September 2019 were enrolled in this study. A 27-gauge trocar formed 3-mm scleral tunnels positioned at 4 and 10 o’clock, 2 mm from the corneal limbus. We used a 3-piece IOL haptic grasped by a 27-gauge retinal forceps and pulled from the 27-gauge trocar. The IOL was fixed by making a flange. Main outcome measures were visual acuity, corneal endothelial cell density, IOL tilt, decentration, predicted error of refraction and complications. Results The 19 eyes were followed up for 1 month. The mean pre- and postoperative logMAR uncorrected visual acuity (UCVA) was 1.06 ± 0.63 and 0.40 ± 0.26, respectively (p < 0.01), while the mean pre- and postoperative logMAR best corrected visual acuity (BCVA) was 0.27 ± 0.51 and 0.06 ± 0.15, respectively (p = 0.09). The mean corneal endothelial cell density was 2406 ± 625 to 2004 ± 759 cells/mm2 at 1 month (p = 0.13). The mean IOL tilt was 3.52 ± 3.00°, and the mean IOL decentration was 0.39 ± 0.39 mm. There was no correlation among IOL tilt, decentration and BCVA (p > 0.05). The mean prediction error of the target refraction was − 0.03 ± 0.93 D. The complications were vitreous hemorrhage (3 eyes), hyphema (1 eye), IOP elevation (1 eye), iris capture of the IOL (1 eye) and hypotony (2 eyes). No IOL dislocation occurred. Conclusions IOL intrascleral fixation with a flange achieved good IOL fixation and visual outcome in the scleral tunnels created with the 27-gauge trocar.