Search Results - "International Ophthalmology"

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 1 ( 2022-07-22), p. 261-269

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1573-2630

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Springer Science and Business Media LLC

2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 42, No. 12 ( 2022-07-25), p. 3829-3836

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Springer Science and Business Media LLC

2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 42, No. 9 ( 2022-07-25), p. 2925-2932

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Springer Science and Business Media LLC

2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 1 ( 2022-07-28), p. 121-130

Angle lambda is the angle between the pupillary axis and the line of sight. It is important for accurate centration during anterior segment surgery. The purpose of this study is to identify the distribution of angle lambda and pupil center offset as measured by a combined placido disc Scheimpflug topography system. Methods A prospective non-randomized study was performed on 2178 eyes in Eye World Hospital, Giza, Egypt. Sirius device (CSO, Costruzione Strumenti Oftalmici, Florence, Italy, version 3.2.1.60) was used to measure average keratometry (K), anterior chamber depth (ACD), central corneal thickness (CCT), horizontal visible iris diameter (HVID), pupil radius (PR), pupil center intercept x-component (PCI-x), and pupil center intercept y-component (PCI-y). Axial length (AL) was measured by immersion A-scan Eyecube Ultrasonography device (Ellex, Adelaide, South Australia, Australia). Angle lambda was calculated by a trigonometrical equation. Pearson correlation was used to analyze the correlation between angle lambda and age and refraction. Results Average angle lambda in all eyes was 3.32° ± 1.99. Mean angle lambda was significantly smallest in myopia and largest in hyperopia. Age correlation to angle lambda was insignificant. Average PCI-x and PCI-y in all eyes was − 0.047 mm and + 0.091 mm, respectively. Conclusions Angle λ is significantly larger in hyperopia than myopia, and the effect of age is insignificant. Pupil center offset was horizontally greater in hyperopia than in myopia. We therefore encourage the preoperative assessment of angle λ to avoid decentered ablation, especially when treating hyperopia.

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Springer Science and Business Media LLC

2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 2 ( 2022-08-11), p. 609-618

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Springer Science and Business Media LLC

2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 2 ( 2022-08-17), p. 541-547

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Springer Science and Business Media LLC

2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 42, No. 12 ( 2022-08-19), p. 3749-3762

Limbal stem cell deficiency (LSCD) is a rare but extremely relevant disease of the eye. LSCD patients often require a variety of surgical procedures, including keratoplasty in some cases. However, the outcome of these surgeries, including opacification and revascularization, is often frustrating due to LSCD relapse. Methods We developed a new surgical technique for the treatment of LSCD in which partial allogenic limbal transplantation (ALT) is carried out as part of penetrating keratoplasty (PK). After the PK, 1–8 slices from the limbal tissue of the donor graft are prepared and placed under the double running sutures attaching the corneal graft. This procedure was performed on 14 patients with LSCD, caused by severe ocular burn in 5 cases and by infection in 9. Between one and eight limbal transplants were used depending on the extension of the LSCD. Results All 14 patients showed stable or increased visual acuity after the ALT surgery compared to their preoperative visual acuity. All of the grafts were integrated into the superficial corneal layers without progression of corneal vascularization beyond the limbal grafts. The median follow-up period was 12 months on average. Conclusion The ALT method seems to be a promising surgical procedure for the treatment of patients with LSCD. It can be properly carried out in the context of keratoplasty and does not require a separate donor tissue. The ALT grafts may offer the possibility of constructing a new limbal region, resulting in stable or even increased visual acuity and the absence of corneal vascularization.

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International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 2 ( 2022-08-26), p. 403-410

To assess the subjective quality of anterior segment photos taken from a smartphone camera adapted to the slit lamp compared to a commercial inbuilt slit-lamp camera. Methods Non-inferiority study. Five paired images of the anterior segment of normal eyes were taken using an iPhone 11 (Apple, Inc., Calif., USA) camera attached to a universal slit-lamp adaptor and a commercial inbuilt slit-lamp camera (Haag-Streit Diagnostics, Bern, Switzerland). Images were collated into a survey in which ophthalmology students, residents, registrars, and consultants participated to select the image taken from the inbuilt slit-lamp camera. If the image quality was subjectively indistinguishable, we expected a 50:50 split for each photograph that was presented. We selected a 10% non-inferiority margin, with the hypothesis that no less than 40% of images believed to be from the conventional camera were in fact from the smartphone camera. Results There were 27 respondents in the survey: ophthalmology consultants ( n  = 7), registrars ( n  = 10), residents ( n  = 7), intern ( n  = 1) and students ( n  = 2). The mean correct identification across the respondents was 11.3 out of 25 (45.2%) images. Overall, the smartphone camera was non-inferior to the inbuilt slit-lamp camera ( p   〈  0.001). The non-inferiority of the smartphone camera was significant for consultants (47.4%, p   〈  0.01), registrars (47.6%, p   〈  0.001) and residents (37.7%, p   〈  0.0001). Conclusions Anterior segment images obtained with a smartphone camera were non-inferior to the commercial inbuilt slit-lamp camera. Smartphone cameras may be a non-inferior tool for communication of anterior segment images having implications for the ease of access to quality telehealth consultations.

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2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 2 ( 2022-08-27), p. 597-608

Using optical coherence tomography angiography (OCTA) to evaluate retinal microvascular changes in sarcoid and tuberculous (TB) posterior uveitis. Methods Cross-sectional observational study includes 30 eyes. FFA and OCTA images were acquired. OCTA images were analyzed for areas of capillary hypo-perfusion, disorganization of the superficial and deep capillary plexuses (SCP and DCP) and intraretinal cystoid spaces and for measuring the size of the foveal avascular zone and vessel density (VD) in the SCP and DCP. Results A total of 11 eyes were associated with TB and 19 with sarcoidosis. By OCTA, 100% had areas of capillary non-perfusion, 36.7% choroidal voids, 30% disorganization of the SCP and DCP and 26.6% intraretinal cystoid spaces. The VD of the DCP was significantly lower in the TB group. On comparing OCTA and FFA, parafoveal ischemia was detected more frequently on OCTA and macular edema more frequently on FFA ( P  =   〈  0.001). The BCVA was not significantly correlated with the VD of the SCP or DCP. Conclusion OCTA can be used in detection of early microvascular changes, segmenting retinal layers and localizing abnormalities. The presence of these changes may aid in the diagnosis of TB and sarcoid uveitis, for prognosis, follow-up and may be the only choice when FFA is contraindicated.

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1573-2630

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2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 3 ( 2022-08-30), p. 771-777

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1573-2630

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Springer Science and Business Media LLC

2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 3 ( 2022-08-30), p. 717-723

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1573-2630

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2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 2 ( 2022-08-31), p. 665-675

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1573-2630

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2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 3 ( 2022-09-02), p. 1013-1026

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1573-2630

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2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 3 ( 2022-09-02), p. 817-824

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1573-2630

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2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 3 ( 2022-09-03), p. 997-1003

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1573-2630

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2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 3 ( 2022-09-05), p. 825-836

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1573-2630

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2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 4 ( 2022-09-09), p. 1413-1435

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1573-2630

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2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC

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1573-2630

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2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 4 ( 2022-09-17), p. 1169-1173

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1573-2630

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2022

2009810-8

International Ophthalmology, Springer Science and Business Media LLC, Vol. 43, No. 4 ( 2022-09-17), p. 1229-1240

To analyse and quantify ocular surface parameters in patients with unilateral neurotrophic keratitis (NK) induced by trigeminal nerve injury post-neurosurgery. Methods The study included 26 unilateral NK patients who had undergone neurosurgery, and 20 matched normal controls. Demographic and clinical characteristics of all participants were collected and analysed. Slit-lamp examination, Cochet–Bonnet aesthesiometry, Keratograph 5 M, and LipiView interferometer were performed on both eyes of 17 mild NK patients. For nine moderate/severe NK patients, sub-basal nerve density was measured by in vivo confocal microscopy. Results Of the 26 patients, nine had acoustic neuroma, nine had trigeminal neuralgia, and eight had neoplasms. Facial nerve paralysis was observed in one of the 17 mild NK eyes (5.9%) and seven of the nine moderate/severe NK eyes (77.8%). Compared to contralateral and normal control eyes, 26 NK eyes showed significantly reduced sensitivity in five corneal regions ( P   〈   0.05). Corneal sensitivity in moderate/severe NK eyes was significantly lower than in mild NK eyes ( P   〈   0.05). Moderate/severe NK eyes had poor visual acuity, and their sub-basal nerve density was lower than that of the controls. The onset of the moderate/severe NK was from 0.5 to 24 months (median [Q1, Q3], 1 [0.5, 2.5] months) after neurosurgery. For the mild NK eyes, the number of total blinks, the first non-invasive tear breakup time (NITBUT) and average NITBUT were significantly lower than contralateral and normal control eyes ( P   〈   0.05), and the number of partial blinks and partial blinking rate were significantly higher than the other two control groups ( P   〈   0.05). Conclusions Patients with NK induced by trigeminal nerve injury following neurosurgery had decreased corneal sensitivity to various degrees accompanied by increased partial blinks and shortened NITBUT. The severity of NK is related to the severity of the corneal sensory impairment. Facial nerve paralysis can worsen the clinical progression of NK. Trial registration Chinese Clinical Trial Registry (ChiCTR2100044068, Date of Registration: March 9, 2021).

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1573-2630

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Springer Science and Business Media LLC

2022

2009810-8