1. 1-17 of 17
    1. Central corneal thickness measurement using ultrasonic pachymeter, optical coherence tomography, and TMS-5 topographer

      Central corneal thickness measurement using ultrasonic pachymeter, optical coherence tomography, and TMS-5 topographer

      AIM: This study aimed to compare the central corneal thickness (CCT) measurements using Optical Coherence Tomography (OCT) and TMS-5 topographer with that taken with the gold standard digital Ultrasonic pachymeter (USP). MATERIALS AND METHODS: A total of 61 subjects (122 eyes) were prospectively and consecutively studied in a period from June 2016 to June 2017 at Sudan Eye Centre (SEC), Khartoum, Sudan. Besides the visual and refractive data, measurements of CCT were taken using OCT, TMS-5 and USP. Data analyzed using SPSS software for windows (IBM SPSS 20, IBM Corp., Armonk, NY). RESULTS: A statistically significant differences in mean CCT ...

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    2. Serial swept-source optical coherence tomography: Tale of a choroidal tuberculom

      Serial swept-source optical coherence tomography: Tale of a choroidal tuberculom

      Choroidal tuberculoma is a solitary elevated choroidal mass-like lesion regarded often characteristic of intraocular tuberculosis. Serial swept-source optical coherence tomography (SS-OCT) is a very important tool in monitoring the course of choroidal tuberculoma and allows in early detection of complications such as choroidal neovascular membrane (CNVM). We describe a 26-year-old young Indian female, who presented with a solitary choroidal mass lesion in the left eye. Based on positive Mantoux test, biopsy of cervical lymph nodes showing acid-fast bacilli and radiographic findings, a diagnosis of choroidal tuberculoma was made. Serial SS-OCT during subsequent follow-up visits up to 14 months demonstrated the ...

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    3. An assessment of variation in macular volume and RNFL thickness in myopes using OCT and their significance for early diagnosis of primary open-angle glaucoma

      An assessment of variation in macular volume and RNFL thickness in myopes using OCT and their significance for early diagnosis of primary open-angle glaucoma

      PURPOSE: An assessment of variation in Macular Volume and RNFL Thickness in myopes using OCT, and their significance for early diagnosis of Primary Open Angle Glaucoma( POAG). MATERIALS AND METHOD: Total of 122 eyes of 61 Indian Myopic subjects of both sex and various age groups underwent retinal nerve fiber layer thickness, macular volume in 6mm analysis by Rtvue Avanti SD-OCT, Optovue Technology V6.1.1,after taking due consent from ethical committee. Subjects were divided into two groups based on their refractive error, Group A <6 D and Group B >6D. The results were evaluated to determine the above ...

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    4. Authors' reply: Subfoveal choroidal thickness measurements in spectral-domain and swept-source optical coherence tomography devices

      Authors' reply: Subfoveal choroidal thickness measurements in spectral-domain and swept-source optical coherence tomography devices

      Sir, We thank authors for the interest shown in our study. We agree that the automated chorio-scleral interface (CSI) detection increases the disparity between the two devices and also that the repeatability of the automated CSI detection feature is inferior to manual segmentation (data not published in our article). We also acknowledge the discrepancy in our Table 1 in relation to the Tan et al .'s study and the difference in measurement techniques of central subfield thickness and automated segmentation of CSI boundaries used in their study. We appreciate the authors for bringing up these points for discussion and highlighting ...

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    5. An analysis of macular thickness in amblyopic eyes in rural India by spectral optical coherence tomography

      An analysis of macular thickness in amblyopic eyes in rural India by spectral optical coherence tomography

      Sir, Functional loss in amblyopia has been well studied and accepted, and there is not much evidence for morphological changes in macula of amblyopic eyes. [1] , [2] , [3] We conducted the study to evaluate the possible morphological changes in macula of amblyopic eyes in the form of altered macular thickness and to compare macular thickness of amblyopic eyes with their fellow eyes (internal controls) and with nonamblyopic individuals (external controls). After approval from the institutional ethics committee, 54 individuals with unilateral amblyopia in the age group of 7–40 years (mean age, 17.3 ± 7.8 years) were included as ...

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    6. Subfoveal choroidal thickness measurements in spectral-domain and swept-source optical coherence tomography devices

      Subfoveal choroidal thickness measurements in spectral-domain and swept-source optical coherence tomography devices

      Sir, We read with interest the article by Narendran et al ., [1] reporting that choroidal thickness measurements obtained using a spectral-domain optical coherence tomography (SD-OCT) device (Spectralis OCT; Heidelberg Engineering, Heidelberg, Germany) and a swept-source OCT (SS-OCT) device (Topcon deep range imaging [DRI] OCT-1; Topcon Inc., Tokyo, Japan) were comparable. In their prospective cohort of 31 normal participants, the authors found that the mean subfoveal choroidal thickness measurements of the SD-OCT and SS-OCT devices were 325.3 and 319.5 μm, respectively. [1] Similar results have also been reported in other studies on subfoveal choroidal thickness in healthy volunteers. [2 ...

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    7. Swept-source optical coherence tomography study of choroidal morphology in Stargardt disease

      Swept-source optical coherence tomography study of choroidal morphology in Stargardt disease

      BACKGROUND: Stargardt disease, a juvenile retinal dystrophy, may show secondary changes in the choroid which may have importance while considering future treatments such as stem cell transplant. OBJECTIVE: To evaluate the choroidal and retinal morphology in patients with Stargardt disease and compare with age-matched normals. SETTING AND DESIGN: This was a case–control study at a tertiary level eye care institute. METHODS: Twenty-six patients (52 eyes) clinically diagnosed with Stargardt disease underwent detailed evaluation with swept-source optical coherence tomography. Retinal and choroidal layers were analyzed and compared with 52 eyes of controls. RESULTS: The median age of patients with Stargardt ...

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    8. Effect of phacoemulsification on measurement of retinal nerve fiber layer and optic nerve head parameters using spectral-domain-optical coherence tomography

      Effect of phacoemulsification on measurement of retinal nerve fiber layer and optic nerve head parameters using spectral-domain-optical coherence tomography

      PURPOSE: The purpose of this study is to determine the effect of phacoemulsification cataract extraction on measurement of retinal nerve fiber layer and optic nerve head parameters using spectral domain optical coherence tomography. MATERIAL AND METHODS: A prospective, hospital-based study of 100 patients of 40 years of age and above, with no other ocular morbidity except cataract and planned for phacoemulsification with IOL implantation (SN60WF) at a tertiary centre at AIIMS, New Delhi, India. All patients underwent imaging with Cirrus SD-OCT model 400 and the optic disc cube 200x200 protocol at baseline and at 1 month follow up. Paired sample ...

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    9. Quantitative spectral domain optical coherence tomography thickness parameters in type II diabetes

      Quantitative spectral domain optical coherence tomography thickness parameters in type II diabetes

      Purpose: To elucidate the changes in retinal thickness and individual layer thickness in subjects with diabetic retinopathy (DR) using spectral domain optical coherence tomography (SDOCT). Materials and Methods: A total of 251 eyes from 170 subjects were included in this study. The study sample was subdivided into nondiabetic subjects; subjects with diabetes but no DR; subjects with mild, moderate, and severe nonproliferative DR (NPDR); and proliferative DR. Various retinal thickness parameters were assessed using SDOCT. Results: The mean age of the study population was 55.34 ± 9.02 years (range: 32-80 years) and 56.6% of the subjects were males ...

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    10. Clinical utility of anterior segment swept-source optical coherence tomography in glaucoma

      Clinical utility of anterior segment swept-source optical coherence tomography in glaucoma

      Optical coherence tomography (OCT), a noninvasive imaging modality that uses low-coherence light to obtain a high-resolution cross-section of biological structures, has evolved dramatically over the years. The Swept-source OCT (SS-OCT) makes use of a single detector with a rapidly tunable laser as a light source. The Casia SS-1000 OCT is a Fourier-domain, SS-OCT designed specifically for imaging the anterior segment. This system achieves high resolution imaging of 10΅m (Axial) and 30΅m (Transverse) and high speed scanning of 30,000 A-scans per second. With a substantial improvement in scan speed, the anterior chamber angles can be imaged 360 degrees ...

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    11. Spectral domain optical coherence tomography characteristics in diabetic retinopathy

      Spectral domain optical coherence tomography characteristics in diabetic retinopathy

      Purpose: To report the appearance of diabetic retinopathy lesions using spectral domain optical coherence tomography (SD-OCT). Materials and Methods: A total of 287 eyes of 199 subjects were included. All the subjects underwent complete ophthalmic examination including SD-OCT. Results: The appearance of various lesions of diabetic retinopathy and the retinal layers involved were reported. In subjects with macular edema the prevalence of incomplete PVD was 55.6%. Conclusion: SD-OCT brings new insights into the morphological changes of the retina in diabetic retinopathy.

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    12. Optical coherence tomography demonstrating macular retinal nerve fiber thinning in advanced optic disc drusen

      Optical coherence tomography demonstrating macular retinal nerve fiber thinning in advanced optic disc drusen

      Optic disc drusen (ODD) are extracellular proteinaceous excrescences in the optic nerve head. They enlarge over time and can cause damage to nerve fibers with resulting loss of visual field. The authors report a case of advanced ODD in which macular optical coherence tomography demonstrated retinal nerve fiber thinning. A single case report of a 42-year-old woman with known ODD presented to the eye clinic with worsening field of vision which was impacting on her daily life. The patient was subject to full ophthalmic examination as well as Goldmann visual field testing, optic disc photography and optical coherence tomography (OCT ...

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    13. Optical coherence tomographic assessment of retinal nerve fiber layer thickness changes before and after glaucoma filtration surgery

      Optical coherence tomographic assessment of retinal nerve fiber layer thickness changes before and after glaucoma filtration surgery

      Background: Glaucomatous Optic Neuropathy (GON) is very common in the glaucoma patients, and impaired effect of glaucoma is measured by the Retinal Nerve Fiber Layer (RNFL) thickness. Objective: The study was conducted to find out the mean RNFL thickness, RNFL thickness in different quadrants, Intra-Ocular Pressure (IOP) changes, and visual field changes after filtration surgery in different ages and genders using Optical Coherence Tomography (OCT). Materials and Methods: The study was an interventional case-series conducted at the Glaucoma Clinic at the Regional Institute of Ophthalmology at Kolkata from March 2009 to August 2010. Fifty-one eyes of 43 open angle glaucoma ...

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    14. Comparison of relation between visual function index and retinal nerve fiber layer structure by optical coherence tomography among primary open angle glaucoma and primary angle closure glaucoma eyes

      Comparison of relation between visual function index and retinal nerve fiber layer structure by optical coherence tomography among primary open angle glaucoma and primary angle closure glaucoma eyes

      Purpose: To compare the visual field index (VFI) in primary open angle glaucoma (POAG) and primary angle closure glaucoma (PACG) eyes, and to study the correlation with disc variables on optical coherence tomography (OCT) in all stages of severity. Materials and Methods: Thirty POAG and PACG underwent Humphrey visual field 24-2 along with detailed examination. They also underwent stratus OCT imaging of the optic nerve and retinal nerve fiber layer (RNFL). The correlation of VFI with RNFL thickness was compared in POAG and PACG. Results: The VFI significantly differed between POAG and PACG, with POAG eyes apparently having a better ...

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    15. Communications between intraretinal and subretinal space on optical coherence tomography of neurosensory retinal detachment in diabetic macular edema

      Communications between intraretinal and subretinal space on optical coherence tomography of neurosensory retinal detachment in diabetic macular edema

      Background: The pathogenesis of development and progression of neurosensory retinal detachment (NSD) in diabetic macular edema (DME) is not yet fully understood. The purpose of this study is to describe the spectral domain optical coherence tomography (SD-OCT) morphological characteristics of NSD associated with DME in the form of outer retinal communications and to assess the correlation between the size of communications and various factors. Materials and Methods: This was an observational retrospective nonconsecutive case series in a tertiary care eye institute. We imaged NSD and outer retinal communications in 17 eyes of 16 patients having NSD associated with DME using ...

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    16. Spectral-domain optical coherence tomography findings in chronic solar retinopathy

      Spectral-domain optical coherence tomography findings in chronic solar retinopathy

      Solar retinopathy is a clinical entity caused by any form of sun gazing most commonly attributed to solar eclipse viewing. [1] Other common causes include sunbathing, religious ritual, involving sun gazing, psychiatric illness, and military activities. [1] Solar retinopathy causes central visual distortion/loss. Acute cases present with typical history of sun exposure and easy to diagnose, but chronic cases are of challenge. Spectral-domain optical coherence tomography (SD-OCT) is a great tool to provide details comparable to histological changes. Here, we are discussing a patient with solar retinopathy diagnosed with the help of SD-OCT.

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    17. Anterior segment optical coherence tomography in intracorneal foreign body

      Anterior segment optical coherence tomography in intracorneal foreign body

      Corneal foreign bodies have been reported to be the second most common type of eye injury, comprising approximately 30.8% of ocular injuries. Anterior segment optical coherence tomography (AS-OCT) is a valuable tool in the early diagnosis and monitoring of treatment progress in cases of ocular trauma.

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    1-17 of 17
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