Central Corneal Thickness, Anterior Chamber Depth, and Pupil Diameter Measurements Using Visante OCT, Orbscan, and Pentacam

Abstract Purpose: In this study the acute effects of 1 session of hyperbaric oxygen therapy on eye anterior segment morphology and on intraocular pressure was evaluated.Materials and methods: 30 patients taking hyperbaric oxygen therapy for different indications were included in this prospective study. Only the right eye per patient was included in the study. The refractive errors were measured with autorefractometry, intraocular pressures were measured with pneumatic tonometry; anterior segment parameters pachymetry, keratometry, anterior chamber depth and iridocorneal angle values were measured with corneal topography prior to and 24 hours after 1 session of hyperbaric oxygen therapy.Results: In this study 30 eyes from a total of 30 patients were evaluated; 19 men (% 64) and 11 women (% 36). Median age was 44.33 ±16.12 (Age range 18-80 years). Mean intraocular pressure was 13.7 ±4,16 mmHg (milimetermercuries), mean central corneal thickness was 531.9 ±28.24 μm, mean anterior chamber depth was 3.30 ±0.375 mm, mean iridocorneal angle value was 35.3± 6.61 degrees before hyperbaric oxygen therapy. The mean intraocular pressure was 12.66±4,54 mmHg, mean central corneal thickness was 529.43± 26.68 μm, mean anterior chamber depth was 3.28±0.372 mm, mean iridocorneal angle value was 34.5±6.42 degrees after HBOT. A statistically significant decrease in these values were recorded. No statistically significant changes were found in spheric equivalent and keratometry values of the patients before and after HBOT.Conclusions: After one session of HBOT a decrease in intraocular pressure, central corneal thickness, anterior chamber depth and iridocorneal angles of patients were observed; keratometry and spheric equivalent values remained unchanged. More studies are needed in order to use the effects of HBOT on anterior segment morphology and on intraocular pressure for situations like glaucoma, corneal edema etc.

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The effect of central corneal thickness on estimates of the anterior chamber depth

Clinical and Experimental Optometry ◽

10.1111/j.1444-0938.2003.tb03081.x ◽

2003 ◽

Vol 86 (6) ◽

pp. 371-375 ◽

Cited By ~ 1

Author(s):

Ebi P Osuobeni ◽

Claire Hegarty ◽

Pinakin Gunvant

Keyword(s):

Anterior Chamber ◽

Central Corneal Thickness ◽

Corneal Thickness ◽

Anterior Chamber Depth

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Relationship Between Central Corneal Thickness, Refractive Error, Corneal Curvature, Anterior Chamber Depth and Axial Length

Journal of the Chinese Medical Association ◽

10.1016/s1726-4901(09)70038-3 ◽

2009 ◽

Vol 72 (3) ◽

pp. 133-137 ◽

Cited By ~ 42

Author(s):

Mei-Ju Chen ◽

Yin-Tzu Liu ◽

Chia-Chen Tsai ◽

Yen-Cheng Chen ◽

Ching-Kuang Chou ◽

...

Keyword(s):

Anterior Chamber ◽

Refractive Error ◽

Axial Length ◽

Central Corneal Thickness ◽

Corneal Thickness ◽

Anterior Chamber Depth ◽

Corneal Curvature

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Evaluation of biometric parameters in phacomorphic glaucoma and mature cataracts

European Journal of Ophthalmology ◽

10.1177/1120672120914536 ◽

2020 ◽

pp. 112067212091453

Author(s):

Ali Keleş ◽

Emine Şen ◽

Ufuk Elgin

Keyword(s):

Anterior Chamber ◽

Axial Length ◽

Odds Ratio ◽

Central Corneal Thickness ◽

Corneal Thickness ◽

Anterior Chamber Depth ◽

Mature Cataract ◽

Biometric Parameters ◽

Significant Difference ◽

The Mean

Purpose: The aims of this study were to compare the biometric parameters and axial lengths of eyes with phacomorphic glaucoma and mature cataract and to identify differences that might predispose to development of phacomorphic glaucoma. Methods: Three hundred forty-two patients were enrolled in this retrospective study. The eyes were divided into four groups—Group (G)1: phacomorphic glaucoma ( n = 29), G2: mature cataract ( n = 313), G3: contralateral phacomorphic glaucoma ( n = 29), and G4: contralateral mature cataract ( n = 313). Central corneal thickness and anterior chamber depth were assessed by optical low-coherence reflectometry (Lenstar LS 900®; Haag-Streit AG, Switzerland), while axial length was determined by A-scan ultrasound biometry. Results: The mean central corneal thickness of G1 was significantly higher than in other groups ( p < 0.001) and the mean anterior chamber depth of G1 was the lowest among the groups ( p < 0.001). Also, G2 had lower mean anterior chamber depth than G4 ( p < 0.001) and G3 had lower mean anterior chamber depth than G4 ( p = 0.007). Anterior chamber depth less than 3.27 mm had the higher odds ratio for distinguishing G3 versus G4 (odds ratio = 10.79, p < 0.001). Furthermore, patients aged ⩾68.9 years had the higher odds ratio for distinguishing G1 versus G2 (odds ratio = 2.82, p = 0.019). There was no significant difference in the presence of pseudoexfoliation material between G1 and G2 ( p = 0.057). There were no significant differences in axial length values among the four groups ( p = 0.097). Conclusion: Advanced age and shallow anterior chamber depth were found to be risk factors for developing phacomorphic glaucoma, but the presence of pseudoexfoliation material was not found to play a role as a risk factor in phacomorphic glaucoma development.

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Inter-Observer Reproducibility of Axial Ocular Measurements with Non-contact HAAG-STRAIT Biometer

Pakistan Journal of Ophthalmology ◽

10.36351/pjo.v37i3.1239 ◽

2021 ◽

Vol 37 (3) ◽

Author(s):

Muhammad Suhail Sarwar ◽

Sehrish Shahid ◽

Muhammad Arslan Ashraf ◽

Shaista Kanwal

Keyword(s):

Data Analysis ◽

Anterior Chamber ◽

Axial Length ◽

Central Corneal Thickness ◽

Corneal Thickness ◽

Anterior Segment ◽

Anterior Chamber Depth ◽

Excellent Correlation ◽

Interclass Correlation ◽

The Mean

Purpose: To check inter observer reproducibility of axial ocular measurements i.e. central corneal thickness (CCT), anterior chamber depth (ACD), aqueous depth (AD), lens thickness (LT), anterior segment lens (ASL), vitreous length (VL) and axial length (AL) with non-contact HAAG-STRAIT biometer. Study Design: Comparative Reproducibility Analysis. Place and Duration of Study: College of ophthalmology and allied vision sciences (COAVS), Mayo Hospital, Lahore. Methods: This study included 66 healthy students (132 eyes). Data was collected through self-designed proforma by 2 operators independently. SPSS 21 was used for data analysis. Interclass correlation was applied for agreement between the two readings. Interclass coefficient (ICC) value greater than 0.7 was considered as excellent correlation. Results: The mean CCT, AD, ACD, LT, ASL, VL, and AL were 526.47 ± 35.72 µm and 526.47 ± 36.06 µm (ICC = 0.92); 2.93 ± 0.29 mm and 2.93 ± 0.29 mm (ICC = 0.81); 3.45 ± 0.30 mm and 3.46 ± 0.30 mm (ICC = 0.79); 3.58 ± 0.28 mm and 3.56 ± 0.22 mm (ICC = 0.76); 7.03 ± 0.30 mm and 7.02 ± 0.27 mm (ICC = 0.80); 16.56 ± 0.85 mm and 16.62 ± 0.81 mm (ICC = 0.72); and 23.59 ± 0.85 mm and 23.64 ± 0.87 mm (ICC: 0.76) of observer 1 and 2, respectively. Conclusion: Non-contact Biometer (HAAG-STRAIT) has high inter-observer reproducibility with strong interclass coefficient of greater than 0.72. Key Words: Biometry, Axial Length, Central Corneal Thickness, Anterior Chamber Depth.

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

Global Journal of Health Science ◽

10.5539/gjhs.v8n12p133 ◽

2016 ◽

Vol 8 (12) ◽

pp. 133 ◽

Cited By ~ 1

Author(s):

Neda Nakhjavanpour ◽

Abolfazl Payandeh ◽

Majid Rajabi ◽

Vahid Shoja

Keyword(s):

Anterior Chamber ◽

Refractive Surgery ◽

Central Corneal Thickness ◽

Corneal Thickness ◽

Anterior Segment ◽

Anterior Chamber Depth ◽

Weather Conditions ◽

Capital City ◽

Linear Regression Models ◽

Corneal Refractive Surgery

<p>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.</p>

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Comparison between a New Optical Biometry Device and an Anterior Segment Optical Coherence Tomographer for Measuring Central Corneal Thickness and Anterior Chamber Depth

Journal of Ophthalmology ◽

10.1155/2016/6347236 ◽

2016 ◽

Vol 2016 ◽

pp. 1-5

Author(s):

Jinhai Huang ◽

Weicong Lu ◽

Giacomo Savini ◽

Hao Chen ◽

Chengfang Wang ◽

...

Keyword(s):

Anterior Chamber ◽

Central Corneal Thickness ◽

Corneal Thickness ◽

Anterior Segment ◽

Anterior Chamber Depth ◽

Normal Subjects ◽

Optical Coherence ◽

Limits Of Agreement ◽

Mean Values ◽

The Mean

Purpose.To compare between a new optical biometer (AL-Scan, Nidek Co., Aichi, Japan) and an anterior segment optical coherence tomographer (Visante AS-OCT, Carl Zeiss Meditec, Dublin, USA) for measuring central corneal thickness (CCT), anterior chamber depth (ACD), and aqueous depth (AD).Methods.Sixty-three eyes of 63 normal subjects were examined with AL-Scan and Visante AS-OCT in this prospective study. One eye per subject was measured three times with both devices to record their CCT, ACD, and AD. All procedures were performed by the same operator. Agreement between the two devices was assessed using pairedt-tests, Bland-Altman plots, and 95% limits of agreement (LoA).Results.The mean CCT, ACD, and AD measured by AL-Scan were538.59±27.37 μm,3.70±0.30 mm, and3.16±0.30 mm, respectively. The mean values obtained by the Visante OCT were536.14±26.61 μm for CCT,3.71±0.29 mm for ACD, and3.17±0.29 mm for AD. The mean CCT by the AL-Scan was higher than that obtained by the Visante AS-OCT (difference =2.45±6.07 μm,P<0.05). The differences in ACD and AD measurements were not statistically significant. The 95% LoA of CCT, ACD, and AD were between −9.44 and 14.35 μm, −0.15 and 0.12 mm, and −0.15 and 0.12 mm, respectively.Conclusions.Since these two devices were comparable for measuring CCT, ACD, and AD, their results can be interchangeably used in the clinic.

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