Role of Optical Coherence Tomography in Assessing Anterior Chamber Angles

Kochupurakal, Reema Thomas; Srikanth, Krishnamoorthy; Jha, Kirti Nath; Rajalakshmi, A R; Nagarajan, Swathi; Ezhumalai, G

doi:10.7860/jcdr/2016/17879.7701

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…is the distance between the corneal endothelium and the anterior iris surface along a perpendicular line drawn across the trabecular meshwork at 500 μm and 750 μm anterior to the scleral spur [7, 8]. The AOD 500 and AOD 750 are calculated by the ‘ AOD tool’ of the OCT program, placing the tool at the scleral spur and then corneal endothelium and iris, and the program calculates the measurements automatically.…”

Section: Methodsmentioning

confidence: 99%

Anterior Segment Parameters on Optical Coherence Tomography in Healthy Children

Nadeem¹

2022

Preprint

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Purpose: To assess the anterior segment parameters in healthy children, using high resolution spectral domain optical coherence tomography (SD-OCT). Design: Prospective, observational study Methods: 108 eyes of 54 healthy children 16 years or less were included after a thorough eye examination. Significant refractive error (> +/-5 DS), history of previous glaucoma, ocular pathology, intraocular surgery, trauma or systemic ailments were excluded. The anterior segment analysis was done by Optopol Revo 80 high resolution SD-OCT. Central corneal thickness (CCT), Angle opening distance (AOD), Anterior chamber (AC) angle, Trabecular iris space area (TISA), Trabecular iris angle (TIA), iris thickness at 2 mm, internal AC diameter and lens vault were evaluated. Results: Mean age was 11.38 years with a female predominance; 29 (53.7%). Mean IOP was 13.63 mmHg, mean axial length was 22.82 mm, mean spherical equivalent was -0.14 D, mean CCT was 532.6 mm and mean CDR was 0.31. The mean internal AC diameter was 11609.15 micron. The nasal AC angle was 53.54 degrees and significantly wider than the temporal AC angle; 50.37 degrees [p=0.008]. The nasal AOD500 was 0.9 mm and not significantly greater than the temporal AOD500, 0.85 [p=0.09]. The nasal AOD750 was 1.21mm, significantly greater than the temporal AOD750, 1.06 [p=0.001]. The nasal TIA was 41.75 degrees; not significantly greater than the temporal TIA, 40.24 degrees [p=0.246]. The nasal TISA500 was 0.33 mm2; not significantly wider than the temporal TISA500, 0.31 mm2 [p=0.056]. The nasal TISA750 was 0. 59 mm2; not significantly wider than the temporal TISA750, 0.56 mm2 [p=0.14]. The nasal iris thickness at 2 mm from pupil was 483.54 micron; not significantly different from the temporal iris thickness, 505.8 micron [p=0.08]. The mean lens vault was -519.58 micron. Conclusions: Our study data depicts the normal anterior segment parameters in healthy children. This will be useful in diagnosing and managing ocular pediatric pathology.

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Section: Methodsmentioning

confidence: 99%

Anterior Segment Parameters on Optical Coherence Tomography in Healthy Children

Nadeem¹

2022

Preprint

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“…Ursächlich sind sicherlich Variationen in der Irisstruktur und -konfiguration, die von einem geübten Untersucher gonioskopisch unter direkter Sicht differenzierter eingeschätzt werden können [18]. Die Überschätzung der Rate an Winkelblöcken wird durch andere Untersuchungen bestätigt, u. a. von Kochupurakal et al, welche der OCT die Verwendung im Screening aufgrund ihrer geringen Spezifitätin dieser Studie zwischen 11,7 und 23,4 %absprechen [19].…”

Section: Optische Kohärenztomografieunclassified

Laseriridotomie – nur bei akuter Engwinkelsituation?

Handzel

Meyer

Wegener

2017

Klin Monatsbl Augenheilkd

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The narrowing of the chamber angle-as a result of anatomic predispositions like high hyperopia or increasing lens thickness-poses the greatest risk for acute angle closure. A laser iridotomy counts as a standard procedure in cases of acute angle closure, whereas there are no coherent recommendations or guidelines for a prophylactic therapy. Modern imaging techniques, such as anterior segment optical coherence tomography or Scheimpflug photography, can give valuable information for the planning of treatment. This review presents traditional and modern imaging techniques and summarises recommendations for action in relation to recent publications.

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“…9,10,11 With gonioscopy still being the gold standard, OCT is more sensitive adjunct to screen narrow angles with future risks of angle closure (12) and helps in patient education as well. 12,13 This case series is presented to find out various mechanisms which are causing the angle closure in our population and to discuss management in each case in a tertiary care setting of Pakistan and the role of anterior segment swept source OCT in management of such cases.…”

Section: Introductionmentioning

confidence: 99%

Role of Anterior Segment OCT in the Management of Primary Narrow Angle Disease

Muid¹,

Farooq²

2020

pak J Ophthalmol

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Purpose: To highlight the role of anterior segment OCT, in complementing gonioscopic findings in the management of angle closure glaucoma. Study Design: Descriptive observational case series. Study Place and Duration: Study was conducted at Eye department of Shifa International Hospital, from January 2019 to March 2019. Methods: After taking informed consent from the patients, the study was conducted at Shifa International Hospital Islamabad. Patients were selected by convenient sampling technique. Patients were diagnosed on the basis of history and clinical examination. Patients with angle closure on Gonioscopy were included in this series. Detailed ocular examination including visual acuity for distance and near, tonometry, Gonioscopy and anterior segment OCT were performed. Data was collected and presented as case series. Results: The median age 57 years with 50% more than 60 years and 50% less than 60 years of age. Presenting IOP was less than 21 mmHg in 50% and higher in remaining 50%. On examination 37.5% were categorized as PACS, 12.5% having PAC and 50% as PACG. After definitive treatment 12.5% still needed medical treatment to prevent progression in PACG and none in PACS and PAC. Conclusion: In narrow angle disease, treatment is designed not only to control intraocular pressure (IOP) but also to keep angle open as much as possible. Appositional closure or peripheral anterior synechiae (PAS) can damage the trabecluar meshwork. Iridoplasty, peripheral Iridotomy (PI) and early lens extraction can defer the need for filtration procedure if done well in time. Key Words: OCT anterior segment, Narrow angle, Optic nerve head.

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Role of Optical Coherence Tomography in Assessing Anterior Chamber Angles

Abstract: Individuals were found to have narrow angles more with SD-OCT. Sensitivity was high and specificity was low in detecting narrow angles compared to gonioscopy, making it an unreliable tool for screening.

Cited by 5 publications

References 12 publications

Anterior Segment Parameters on Optical Coherence Tomography in Healthy Children

Anterior Segment Parameters on Optical Coherence Tomography in Healthy Children

Laseriridotomie – nur bei akuter Engwinkelsituation?

Role of Anterior Segment OCT in the Management of Primary Narrow Angle Disease

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