The Relationship Between Anterior Chamber Depth and the Presence of Diabetes in the Tanjong Pagar Survey

2007 ◽  
Vol 144 (2) ◽  
pp. 325-326 ◽  
Author(s):  
Seang-Mei Saw ◽  
Tien Y. Wong ◽  
Steven Ting ◽  
Athena W.P. Foong ◽  
Paul J. Foster
Keyword(s):  
Anterior Chamber ◽  
Anterior Chamber Depth ◽  
The Relationship

scholarly journals Iris surface features and anterior chamber depth in Chinese adolescents

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Chen-Wei Pan ◽  
Yu-Xi Qian ◽  
Jun Li ◽  
Hua Zhong
Keyword(s):  
Anterior Chamber ◽  
Anterior Chamber Depth ◽  
Estimating Equation ◽  
Linear Regression Models ◽  
Surface Features ◽  
School Based ◽  
Significant Relationships ◽  
Grade 3 ◽  
Adjusted Model ◽  
The Relationship

Abstract Background We aim to determine the association of iris surface features including crypts, color and contraction furrows with anterior chamber depth (ACD) in a school-based sample of Chinese teenagers. Methods Totally, 2346 students aged 13 to 14 years in Mojiang located in the Southwestern part of China contributed to this analysis. Iris surface features were graded based on standardized slit-lamp photographs. Ocular biometric parameters including ACD were measured using an IOL Master. Generalized estimating equation was incorporated in the linear regression models to assess the relationship between iris surface features and ACD. Results A significant trend of increasing ACDs with more contraction furrows were observed. On average, the mean ACD was 3.03 mm in participants with contraction furrows of grade 1 while it was 3.10 mm in those with grade 3 (mean difference, 0.07 mm, P = 0.01). Adjusting for other potential confounders such as gender, height and weight did not significantly changed the associations. Compared with individuals with contraction furrows of grade 1, those with grade 3 had a greater ACD of 0.06 mm (95% confidence interval: 0.01, 0.11) in multivariate-adjusted model. There were no significant relationships between ACD and iris crypts or color. (P > 0.10). Conclusions More iris contraction furrows are associated with greater ACDs while the association with iris color and crypts were not significant.

scholarly journals Influence of the anterior chamber depth on the accuracy of IOL optical power calculation in short eyes

2021 ◽  
Author(s):  
Кирилл Борисович Першин ◽  
Надежда Федоровна Пашинова ◽  
Иван Александрович Лих ◽  
Александр Юрьевич Цыганков ◽  
Абдусамад Аристанович Ахраров
Keyword(s):  
Anterior Chamber ◽  
Anterior Chamber Depth ◽  
Optical Power ◽  
Power Calculation ◽  
Group Iii ◽  
Group I ◽  
Retrospective Comparison ◽  
Group Ii ◽  
The Relationship

Aim. Determination of the relationship between the anterior chamber depth and the and accuracy of the IOL optical power calculating in the eyes with an axial length of less than 22 mm. Materials and methods. A total of 86 patients (133 eyes) with a short axis (from 18.54 to 21.98 (20.7 0.9) mm) were included in the study. Group I (n=40) consisted of patients with an ACD of less than 2, 5 mm. Group II (n=49) included patients with ACD from 2.5 to 2.9 mm Group III (n=44) included patients with ACD greater than 2.9 mm The calculation of the IOL optical power was carried out according to the formula SRK / T, retrospective comparison - according to the formulas Hoffer-Q, Holladay II, Olsen, Haigis and Barrett Universal II. Results. In group I, there were no significant differences when comparing MedAE for the six formulas (p0.05). The highest MedAE values ​​(0.51 and 0.49, respectively) and the smaller MNE range (-0.03 0.89 and -0.01 0.97, respectively) are shown for the formulas Haigis and Barrett Universal II. In group II, the MedAE for the Haigis formula was 0.45, for SRK / T and Olsen it was 0.59 and 0.66. For the Haigis formula, the lowest MNE value (0.05 0.69) is shown. In group III, no significant differences were found when comparing the average values ​​of MedAE (0.05). The lowest MedAE (0.17) and the best MNE values ​​(-0.01 0.58) are shown for the Haigis formula, while the SRK / T formula was characterized by the highest MedAE (0.37). In group II, the refractive index 0.25 and 0.50 D for the Haigis formula was significantly higher. Conclusion. For eyes with an ACD of less than 2.4 mm, none of the formulas showed a significant advantage, while with an ACD of 2.4-2.9 mm and higher, the use of the Haigis formula is recommended, and the SRK / T formula showed the worst result. The data obtained dictate the need to review existing standards for calculating the IOL optical power in patients with short eyes depending on ACD.

scholarly journals Pupil Size Associated with the Largest Iris Volume in Normal Chinese Eyes

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Shuning Li ◽  
Jing Jiang ◽  
Yiquan Yang ◽  
Gewei Wu ◽  
Shi-Ming Li ◽  
...  
Keyword(s):  
Anterior Chamber ◽  
Pupil Size ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Quadratic Equation ◽  
Swept Source ◽  
Chamber Volume ◽  
Anterior Chamber Volume ◽  
The Relationship ◽  
Pupillary Size

Background. To determine the range of pupil size that has the largest iris volume in normal eyes. Methods. 31 healthy adult Chinese volunteers underwent swept-source anterior segment OCT examination in both eyes. Pilocarpine 1% was instilled in a randomly selected eye (eye with induced miosis (ME)) of each participant to obtain iris volume (IV) measurements over a range of pupil sizes. OCT was performed prior to and one hour after pilocarpine in both ME and fellow eye (FE). Iris volume (IV), anterior chamber volume (ACV), anterior chamber depth (ACD), and pupil size (PS) were recorded. A scatter plot was used to depict the association between each pupil size and IV. Results. The pupillary sizes for which IV was recorded in ME and FE ranged from 1.161 mm to 6.665 mm. The mean IV increased with miosis in both ME and FE; in 13 eyes, IV decreased with a decrease in pupillary size. PS between 3.812 and 6.665 mm was associated with an increase in IV, while PS between 3.159 and 5.54 mm was associated with a decrease. The relationship between PS and IV was in the shape of a downward parabola and was modeled using a quadratic equation (y = −1.3121x2 + 8.8429x + 16.423, R2 = 0.26886). The largest IV occurred at PS between 3 and 4 mm. Conclusions. The relationship between PS and IV in this study was in the shape of a downward parabola. The largest IV was recorded at a pupillary size between 3 and 4 mm. This trial is registered with ChiCTR-ROC-17013572.

scholarly journals Responses of the Ocular Anterior Segment and Refraction to 0.5% Tropicamide in Chinese School-Aged Children of Myopia, Emmetropia, and Hyperopia

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Ying Yuan ◽  
Zhengwei Zhang ◽  
Jianfeng Zhu ◽  
Xiangui He ◽  
Ergang Du ◽  
...  
Keyword(s):  
Anterior Chamber ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
School Aged Children ◽  
Lens Thickness ◽  
Lens Position ◽  
Before And After ◽  
Chinese School ◽  
The Relationship ◽  
Parameters Of Interest

Purpose. To investigate the changes of anterior segment after cycloplegia and estimate the association of such changes with the changes of refraction in Chinese school-aged children of myopia, emmetropia, and hyperopia.Methods. 309 children were recruited and eligible subjects were assigned to three groups: hyperopia, emmetropia, or myopia. Cycloplegia was achieved with five cycles of 0.5% tropicamide. The Pentacam system was used to measure the parameters of interest before and after cycloplegia.Results. In the myopic group, the lenses were thinner and the lens position was significantly more posterior than that of the emmetropic and hyperopic groups in the cycloplegic status. The correlations between refraction and lens thickness (age adjusted;r=0.26,P<0.01), and lens position (age adjusted;r=-0.31,P<0.01) were found. After cycloplegia, ACD and ACV significantly increased, while ACA significantly decreased. Changes in refraction, ACD, ACV, and ACA were significantly different among the three groups (P<0.05, all). Changes of refraction were correlated with changes of ACD (r=0.41,P<0.01).Conclusions. Myopia presented thinner lenses and smaller changes of anterior segment and refraction after cycloplegia when compared to emmetropia and hyperopia. Changes of anterior chamber depth were correlated with refraction changes. This may contribute to a better understanding of the relationship between anterior segment and myopia.

scholarly journals The Relationship between Anterior Chamber Depth, Axial Length and Intraocular Lens Power among Candidates for Cataract Surgery

10.19082/3127 ◽  
2016 ◽  
Vol 8 (10) ◽  
pp. 3127-3131 ◽  
Author(s):  
Mohammad Reza Sedaghat ◽  
Ali Azimi ◽  
Peyman Arasteh ◽  
Naghmeh Tehranian ◽  
Shahram Bamdad
Keyword(s):  
Cataract Surgery ◽  
Anterior Chamber ◽  
Intraocular Lens ◽  
Axial Length ◽  
Anterior Chamber Depth ◽  
Intraocular Lens Power ◽  
Lens Power ◽  
The Relationship

Management of Anterior Chamber Depth After Trabeculectomy

1988 ◽  
Vol 106 (6) ◽  
pp. 767-768 ◽  
Author(s):  
RICHARD J. MACKOOL ◽  
JORGE N. BUXTON
Keyword(s):  
Anterior Chamber ◽  
Anterior Chamber Depth

scholarly journals Polypharmacy-associated potential contraindications of drug prescriptions in patients with primary angle closure disease in a real-world setting

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Fumiaki Tanaka ◽  
Naoki Shibatani ◽  
Kazumi Fujita ◽  
Hiroaki Ikesue ◽  
Satoru Yoshimizu ◽  
...  
Keyword(s):  
Intraocular Pressure ◽  
Anterior Chamber ◽  
Anterior Chamber Depth ◽  
Japanese Patients ◽  
Median Number ◽  
Angle Closure ◽  
Primary Angle Closure ◽  
Primary Angle Closure Glaucoma ◽  
Number Of Patients ◽  
Multiple Drugs

Abstract Background Primary angle closure disease (PACD) is a type of glaucoma in which the intraocular pressure (IOP) is increased because of the blockage of the anterior chamber angle. Medications contraindicated for patients with PACD, such as anticholinergics, cause mydriasis, and can elevate IOP. However, anticholinergics are currently contraindicated only for primary angle closure glaucoma (PACG) in Japanese package inserts. In this study, we investigated the prescription status of medications contraindicated for PACD, such as anticholinergics, in patients with PACD scheduled for eye surgeries. Methods Forty-three Japanese patients diagnosed with PACD at Kobe City Eye Hospital, Japan, and scheduled hospitalization for eye surgeries between December 2017 and July 2018, were included. Data, including sex, age, diagnosis, IOP, anterior chamber depth, and patients’ regular medications prior to hospitalization, were collected for each patient from the electronic medical records. Results The number of patients with chronic primary angle closure (CPAC) and acute primary angle closure (APAC) was 35 (81.4%) and 8 (18.6%), respectively. Among all the 43 patients with PACD, 8 (18.6%) received 15 medications that are potentially contraindicated for PACD by non-ophthalmologist. According to medication categories, benzodiazepine hypnotics were the most commonly prescribed. Among the 8 patients with APAC, 2 (25.0%) had routinely received medications contraindicated for PACD. The median number of all kinds of prescriptions on the day of hospitalization was significantly higher for patients who received medications contraindicated for PACD than for those who did not receive them (p = 0.010). Conclusions About 20% of patients with PACD received medications potentially contraindicated for PACD, such as anticholinergics. Attention should be paid to patients prescribed multiple drugs for adverse events, such as increase in intraocular pressure.

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