scholarly journals Evaluation the Acute Effects of Hyperbaric Oxygen Therapy on Eye Anterior Segment Morphology and on İntraocular Pressure

2021 ◽  
Author(s):  
Fatih Akıncı ◽  
Abdullah Arslan ◽  
Muammer Özcimen
Keyword(s):  
Intraocular Pressure ◽  
Anterior Chamber ◽  
Hyperbaric Oxygen ◽  
Hyperbaric Oxygen Therapy ◽  
Central Corneal Thickness ◽  
Oxygen Therapy ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Iridocorneal Angle

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.

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

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.

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

2016 ◽  
Vol 8 (12) ◽  
pp. 133 ◽  
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>

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

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.

scholarly journals Agreement between anterior segment Optical Coherence Tomography, Lenstar and Ultrasound Biomicroscopy measurements of anterior segment parameters

2019 ◽  
Author(s):  
Ziyan Yu ◽  
Ting Huang ◽  
Qiao Yu ◽  
Jun Kong ◽  
Bo Qu
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Central Corneal Thickness ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Ultrasound Biomicroscopy ◽  
Optical Coherence ◽  
Significant Difference ◽  
Medical University

Abstract Purpose To compare anterior chamber depth (ACD) and central corneal thickness (CCT) measurements by anterior segment optical coherence tomography (AS-OCT), Lenstar and ultrasound biomicroscopy (UBM). Methods A retrospective cross section study. A total of 83 eyes from 54 patients were included. Central corneal thickness (CCT) and anterior chamber depth (ACD) values obtained from three devices (AS-OCT, Lenstar and UBM) were recorded. All patients were collected from Oct. 2015 to Aug. 2016 in the Fourth Affiliated Hospital of China Medical University. Differences of these three devices (ACD and CCT) were statistically analyzed by randomized blocks analysis. Pearson correlative analysis and Bland-Altman analysis were used to compare the correlation and agreement. Results There’s no significant difference in measuring ACD by Lenstar and UBM (P>0.05), but there were significant differences in other two groups (AS-OCT and UBM, AS-OCT and Lenstar) (P<0.05). There were significant differences in the mean CCT measured by the three devices (P<0.05). There were high correlation in measuring ACD (all P<0.001, r1=0.928,r2=0.982,r3=0.932, respectively), and CCT(all P<0.001,r1=0.957,r2=0.949,r3=0.928, respectively). Conclusion AS-OCT, Lenstar and UBM yielded comparable results and are all can be used interchangeably for anterior segment measurements.

scholarly journals Changes in Iridocorneal Angle Configuration and Intraocular Pressure during Smartphone Use under Room Light

2021 ◽  
Vol 62 (9) ◽  
pp. 1252-1258
Author(s):  
Seong Taik Lee ◽  
Su Jin Park ◽  
Yong Koo Kang ◽  
Jae Pil Shin ◽  
Dai Woo Kim ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Iridocorneal Angle ◽  
Room Light ◽  
Reading Text ◽  
Iop Measurement ◽  
Smartphone Use ◽  
Patient At Risk

Purpose: To investigate changes in intraocular pressure (IOP) and iridocorneal angle (ICA) configuration during smartphone use under room light. Methods: We included healthy adults aged 19-35 years with no ophthalmological abnormalities. All read text on a smartphone for 6 minutes under room light. IOP was measured via rebound tonometry at baseline and at 2, 4, and 6 minutes. ICA images were obtained via anterior segment optical coherence tomography after each IOP measurement. After 6 minutes, participants stopped reading text and rested for 2 minutes. IOP was then measured again. Results: The IOP significantly increased at 2, 4, and 6 minutes of reading compared to baseline (p < 0.001) but recovered to baseline after 2 minutes of rest (p = 1.000). The anterior chamber depth decreased significantly, and the anterior chamber angle width increased after 6 minutes of smartphone reading (both p < 0.05). Conclusions: IOP increased when reading smartphone text under room light but the ICA did not change. Prolonged smartphone reading is inappropriate for a patient at risk of glaucoma or glaucoma progression. Such patients should be cautioned.

Influence of Hyperbaric Oxygen Therapy on Central Corneal Thickness

2012 ◽  
Vol 47 (1) ◽  
pp. 19-22 ◽  
Author(s):  
Ali Ayata ◽  
Gunalp Uzun ◽  
Mesut Mutluoglu ◽  
Melih Unal ◽  
Senol Yildiz ◽  
...  
Keyword(s):  
Hyperbaric Oxygen ◽  
Hyperbaric Oxygen Therapy ◽  
Central Corneal Thickness ◽  
Oxygen Therapy ◽  
Corneal Thickness

Intraocular Pressure Spikes after Aflibercept Intravitreal Injections

2016 ◽  
Vol 236 (1) ◽  
pp. 43-47 ◽  
Author(s):  
Hussam El Chehab ◽  
Emilie Agard ◽  
Aurélie Russo ◽  
Ygal Boujnah ◽  
Corinne Dot
Keyword(s):  
Intraocular Pressure ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Angle Closure ◽  
Iridocorneal Angle ◽  
Chamber Volume ◽  
Short Period ◽  
Anterior Chamber Volume ◽  
Acute Increase

The objective of this study was to assess the intraocular pressure (IOP) as well as the anatomical modifications of the anterior segment following an aflibercept injection. Patients underwent an aflibercept intravitreal injection (IVI) (0.05 ml) with a 30.5-gauge needle and an antireflux system. IOP was assessed before injection (T0), immediately after (T1), and 5 min (T5), 15 min (T15), and 45 min (T45) after the IVI. Before the IVI and immediately after the T1 measurement, a PENTACAM® acquisition was used to evaluate the anterior chamber parameters (anterior chamber volume, depth and measure of the iridocorneal angle). At T0, IOP was 12.9 ± 1.3 mm Hg. IOP significantly increased after IVI (42.7 ± 3 mm Hg, p < 0.001). IOP returned to baseline at T45 (13.0 ± 1.2 mm Hg, p = 0.877). Anterior chamber volume decreased after IVI (160.6 vs. 168.3 mm3, p = 0.002). No significant changes were found for iridocorneal angle and anterior chamber depth. Aflibercept IVI causes an acute increase in IOP over a short period without iridocorneal angle closure.

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