Evaluation of anterior chamber parameters with spectral-domain optical coherence tomography

Lozano, Isabel Pinilla; Fuente, C López De La; Segura, Francisco; Sánchez‐Cano, Ana

doi:10.1007/s10384-017-0548-3

Cited by 2 publications

(5 citation statements)

References 45 publications

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“…Regarding the correlation between age and angle values, our study suggested a strong negative correlation between age and angle values; that is, older age is associated with smaller angle parameters. The lens thickness increases with aging might explain this negative correlation, and several studies strongly agree with this correlation [11,12,23]. The study also indicated a strong and positive correlation between the grade of the angle (based on Shaffer classification) and angle values, and a higher angle grade (wider angle) was associated with larger angle values.…”

Section: Discussionsupporting

confidence: 60%

“…AS-OCT usage in angle-closure subjects to examine angle requires comprehensive angle biometry assessment through accurate credentials of the scleral spur as the sclera point of the inward protrusion [21]. In our study, we analyzed the AOD500, AOD750, TISA500, and TISA750 from temporal and nasal angles (from 0 to 180 degrees), which were found to be adequate for assessing the angle by many studies [10,12,17]. However, other studies included ICA measurement from superior and inferior quadrants, which might be susceptible to measurement errors due to the need for eyelid manipulation [9,12].…”

Section: Discussionmentioning

confidence: 99%

“…In our study, we analyzed the AOD500, AOD750, TISA500, and TISA750 from temporal and nasal angles (from 0 to 180 degrees), which were found to be adequate for assessing the angle by many studies [10,12,17]. However, other studies included ICA measurement from superior and inferior quadrants, which might be susceptible to measurement errors due to the need for eyelid manipulation [9,12]. In our study, the mean angle values were higher compared to what was reported by Leung et al [17].…”

Section: Discussionmentioning

confidence: 99%

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Biometric Measurement of Iridocorneal Angle Parameters in a Sample of Healthy Saudi Eyes

Bakr,

Al Naqeeb,

Al Mulla

2023

TOOPHTJ

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Background: Iridocorneal angle (ICA) or anterior chamber angle is the anatomical structure responsible for aqueous humor outflow and regulating intraocular pressure inside the eye. Objective: The study aims to evaluate iridocorneal angle parameters in healthy Saudi eyes using the spectral domain located in the anterior segment optical coherence tomography (AS-OCT) and to describe their correlation with other factors. Methods: For precise measurements of ICA, anterior segment imaging was executed with the aid of spectral-domain AS-OCT MS-39®. The measurements of the iridocorneal angle included angle opening distance (AOD) and trabecular-iris space area (TISA), located 500 and 750 μm away from the actual scleral spur from nasal and temporal angles. Results: The comparison of temporal and nasal angle parameters showed significantly higher AOD500 values in the temporal compared to the nasal angle (p=0.005). The study also evaluated correlations with a grade of the angle, and no correlations were found between gender, refractive error, iris thickness, and angle parameters. Multiple linear regression with backward elimination of non-significant factors found age (p=0.002), angle grade (p<0.001), predicting factors for nasal AOD500 (Adjusted R2=0.772, p<0.001), and angle grade (p<0.001) and temporal iris thickness (p=0.004) predicting factors for temporal AOD500 (Adjusted R2=0.511, p<0.001). IOP (p =0.026) and angle grade (p<0.001) were found to predict factors for nasal TISA500 (Adjusted R2=0.639, p<0.001), and angle grade (p<0.001) and temporal iris thickness was found predicting factors for temporal TISA500 (Adjusted R2=0.314, p<0.001). Conclusion: AS-OCT is a valuable, easy, non-aggressive method to evaluate the iridocorneal angle.

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Section: Discussionsupporting

confidence: 60%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Biometric Measurement of Iridocorneal Angle Parameters in a Sample of Healthy Saudi Eyes

Bakr,

Al Naqeeb,

Al Mulla

2023

TOOPHTJ

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“…[ 29 ] WTW distance, spur to spur distance, lens thickness, vault, ACA500, and AOD500 were measured using AS-OCT. ACA500 was measured by placing the apex in the iris recess, and passing the angle’s arms through a point on the trabecular meshwork at 500 μm from the point on the iris that is directly opposite to the scleral spur. [ 23 , 30 ] The AOD500 is the distance from the posterior cornea surface and the anterior iris surface, which is measured on a line perpendicular to the trabecular meshwork 500 μm from the scleral spur. [ 23 , 30 , 31 ] The measures of ACA500 and AOD500 are shown in Figure 1 .…”

Section: Methodsmentioning

confidence: 99%

“…[ 23 , 30 ] The AOD500 is the distance from the posterior cornea surface and the anterior iris surface, which is measured on a line perpendicular to the trabecular meshwork 500 μm from the scleral spur. [ 23 , 30 , 31 ] The measures of ACA500 and AOD500 are shown in Figure 1 .…”

Section: Methodsmentioning

confidence: 99%

A comparative study of two phakic posterior chamber implantable lenses

Yu,

Kang,

Tchah

et al. 2024

Medicine

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This study aimed to compare the postimplantation clinical outcomes of 2 types of posterior chamber phakic intraocular lenses (IOLs): Visian™ implantable collamer lenses (ICL; EVO+ V5; Staar Surgical, Monrovia, CA) and an implantable phakic contact lens (IPCL) (IPCL V2.0, Care Group Sight Solution, India) to correct high myopia and myopic astigmatism. This retrospective study included patients who had undergone phakic IOL implantation performed by a single surgeon between March 2021 and March 2022. Preoperative assessments included slit-lamp examination, fundus examination, spherical equivalent, uncorrected distant visual acuity (UDVA), corrected distant visual acuity (CDVA), specular microscope parameters, and optical quality analysis system parameters. Postoperative assessments after 1 year included slit-lamp examination to detect adverse effects and spherical equivalent, UDVA, CDVA, specular microscope, optical quality analysis system, and anterior-segment optical coherence tomography. Eighty eyes from 42 patients (47 eyes from 24 patients in the ICL group and 33 eyes from 18 patients in the IPCL group) were included. No statistically significant differences were observed between the 2 groups regarding preoperative parameters. At 1-year postoperatively, the mean UDVA in the ICL and IPCL groups was 0.019 ± 0.040 logMAR and 0.019 ± 0.041 logMAR, respectively. The mean CDVA was 0.001 ± 0.008 logMAR and 0.001 ± 0.007 logMAR in the ICL and IPCL groups, respectively, showing no statistically significant differences. The postoperative parameters did not differ significantly between the 2 groups. The visual acuity and refractive results of both groups were excellent, and both groups exhibited similar efficacy and safety profiles.

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Evaluation of anterior chamber parameters with spectral-domain optical coherence tomography

Cited by 2 publications

References 45 publications

Biometric Measurement of Iridocorneal Angle Parameters in a Sample of Healthy Saudi Eyes

Biometric Measurement of Iridocorneal Angle Parameters in a Sample of Healthy Saudi Eyes

A comparative study of two phakic posterior chamber implantable lenses

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