Optical Coherence Tomography Findings in Highly Myopic Eyes following Cataract Surgery (original) (raw)
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Review Article Optical Coherence Tomographic Findings in Highly Myopic Eyes
2010
Optical coherence tomography (OCT) has enhanced our understanding of changes in different ocular layers when axial myopia progresses and the globe is stretched. These findings consist of dehiscence of retinal layers known as retinoschisis, paravascular inner retinal cleavage, cysts and lamellar holes, peripapillary intrachoroidal cavitation, tractional internal limiting membrane detachment, macular holes (lamellar and full thickness), posterior retinal detachment, and choroidal neovascular membranes. In this review, recent observations regarding retinal changes in highly myopic eyes explored by OCT are described to highlight structural findings that cannot be diagnosed by simple ophthalmoscopy.
Optical coherence tomographic findings in highly myopic eyes
Journal of ophthalmic & vision research, 2010
Optical coherence tomography (OCT) has enhanced our understanding of changes in different ocular layers when axial myopia progresses and the globe is stretched. These findings consist of dehiscence of retinal layers known as retinoschisis, paravascular inner retinal cleavage, cysts and lamellar holes, peripapillary intrachoroidal cavitation, tractional internal limiting membrane detachment, macular holes (lamellar and full thickness), posterior retinal detachment, and choroidal neovascular membranes. In this review, recent observations regarding retinal changes in highly myopic eyes explored by OCT are described to highlight structural findings that cannot be diagnosed by simple ophthalmoscopy.
Experimental and Therapeutic Medicine, 2020
The aim of the present study was to evaluate macular vascular density (MVD) variation after uneventful cataract surgery using optical coherence tomography angiography (OCTA) in patients with high myopia. Patients with cataracts scheduled for cataract surgery were divided into a high-myopia group [spherical equivalent (SE)≤-6.0 diopter (D) and axial length (AL)≥25 mm] and a low-myopia group (SE>-6.0 D and AL<25 mm). All patients were examined for MVD and retinal thickness (RT) with OCTA pre-operatively and post-operatively (1 day, 1 week, and 1 and 3 months after surgery). A total of 55 eyes from 44 patients were included. MVD and RT both changed after cataract surgery. The mean change in superficial vascular density (SVD) in patients with high myopia was significantly lower than that in the low-myopia group at the four post-operative time-points (all P<0.05). In addition, the RT of eyes with high myopia exhibited a different variation compared with that of the low-myopia group. Significant correlations were identified between AL, RT, intraocular pressure and SVD after surgery. In conclusion, superficial retinal perfusion in patients with high myopia was significantly lower than that in low myopia patients, which may lead to complications caused by poor perfusion.
Canadian journal of ophthalmology. Journal canadien d'ophtalmologie, 2018
The aim of this study was to assess changes in subfoveal choroidal thickness (SFCT), measured using swept-source optical coherence tomography (SS-OCT), after routine phacoemulsification cataract surgery. This is a prospective, interventional, controlled study that took place at Shahzad Eye Hospital, Karachi, Pakistan, between February 2015 and January 2016. One hundred and one patients who were undergoing routine cataract surgery were recruited. One eye per patient was included. The unoperated fellow eyes acted as controls. Swept-source optical coherence tomography scans were performed preoperatively, 1 week postoperatively, and 1 month postoperatively. Two independent graders evaluated the scans to measure the SFCT. The SFCT was measured and recorded for OCT scans from each visit. The general linear model repeated analysis technique was used to assess data from the 3 different time intervals, and paired t tests were used to assess a statistically significant difference between mean...
Neovascularization Secondary to High Myopia Imaged by Optical Coherence Tomography Angiography
Retina, 2017
Purpose: To describe the optical coherence tomography angiography (OCTA) characteristics of active myopic choroidal neovascularization (CNV) and to compare its sensitivity versus fluorescein angiography and spectral-domain optical coherence tomography. Methods: Consecutive highly myopic patients complicated with active myopic CNV were prospectively included. The OCTA features were analyzed and correlated with the findings of conventional imaging (spectral-domain optical coherence tomography and fluorescein angiography). Results: Twenty eyes of 19 patients (mean age: 59.6 ± 12.1 years, mean spherical equivalent: 213.5 ± 3.6 diopters) presenting with both treatment-naive CNV and recurrent CNV were included in the analysis. The OCTA showed a 90% sensitivity for myopic CNV detection in 18 of 20 eyes, revealing a high-flow neovascular network accurately visible using a 30-mm manual segmentation underneath Bruch membrane. Mean selected area of myopic CNV on OCTA images was 0.34 ± 0.45 mm 2 , whereas the mean vessel area was 0.22 ± 0.27 mm 2. Two neovascular phenotypes prevailed in our series: disorganized vascular loops and organized interlacing patterns. Conclusion: The OCTA seems to be a valuable tool in detecting myopic CNV with a high sensitivity. However, its specificity needs to be investigated in further studies.
International Journal of Contemporary Medical Research [IJCMR], 2018
Introduction: The World Health Organization estimates that the current global prevalence of blindness is 0.57% (range: 0.2%-1%), with more than 82% of all blindness occurring in individuals aged 50 and older. 3.8 million persons become blind from cataract each year in India. The aim of the current study was to determine macular thickness changes after uncomplicated cataract surgery and in cataract surgery complicated with posterior capsule rent using spectral domain optical coherence tomography (OCT). Material and Methods: This was a prospective casecontrol study. Out of 60 patients, 30 patients complicated by posterior capsular rent were taken as cases on a continuance basis and 30 patients of uncomplicated cataract surgery as controls as a convenience non random sampling method. OCT measurements were performed before surgery and postoperatively at day 1, week 1 and 6. Post operatively, slit lamp examination was done on the first day and in further follow ups. BCVA was recorded using Snellen's chart on the post-operative 1 st day, 1 st week and 6 th week. This was later converted to LogMAR visual acuity for statistical analysis. Results: CME was diagnosed when there was increase in central macular thickness by more than or equal to 40% increase from baseline. 2 patients in controls (Group 1) had an increase of central macular thickness by 16% from baseline but none of the patients in controls (Group 1) developed CME. Out of the 30 patients in cases (Group 2), 4 patients developed CME changes. Conclusion: Mean macular thickness values measured using OCT were found to be significantly high in eyes which underwent cataract surgery complicated with posterior capsule rent when compared to the eyes which underwent uneventful cataract surgery.
Oct Findings in High Myopic Patients
IOSR Journals , 2019
Purpose - to study the Oct findings in high myopic patients Methods- This was a prospective observational study that involved 100 eyes of 50 patients with high myopia complaining of recent diminution of vision. OCT examination was done through dilated pupils,OCT examination was done through a dilated pupil using commercially available Results-There were 30 females and 20 males and was done in the age group 15-30 years Epiretinal membrane was present in 32 eyes. Vitreomacular traction (anteroposterior traction) was detected in 5 eyes. . Macular retinoschisiswas present in 20eyes Conclusion-Optical coherence tomography (OCT) has enhanced our understanding of changes in different ocular layers when axial myopia progresses and the globe is stretched. These findings consist of dehiscence of retinal layers known as retinoschisis, paravascular inner retinal cleavage, cysts and lamellar holes, peripapillaryintrachoroidal cavitation, tractional internal limiting membrane detachment, macular holes (lamellar and full thickness), posterior retinal detachment, and choroidal neovascular membranes. In this review, recent observations regarding retinal changes in highly myopic eyes explored by OCT are described to highlight structural findings that cannot be diagnosed by simple ophthalmoscopy