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Displaying publications 21 - 27 of 27 in total

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Intravitreal bevacizumab for radiation-induced cystoid macular oedema in patients with nasopharyngeal carcinoma: a clinical series

Subrayan V, Khaw KW, Peyman M, Koay AC, Tajunisah I

Ophthalmologica, 2013;229(4):208-11.
PMID: 23548379 DOI: 10.1159/000348630

To evaluate the outcome of intravitreal bevacizumab in the treatment of radiation-induced cystoid macular oedema among patients who underwent external beam radiotherapy for nasopharyngeal carcinoma.

Matched MeSH terms: Macula Lutea/pathology; Macula Lutea/radiation effects*
Fulltext Macular retinal sensitivity using MP-1 in healthy Malaysian subjects of different ages

Ismail SA, Sharanjeet-Kaur, Mutalib HA, Ngah NF

J Optom, 2015 Oct-Dec;8(4):266-72.
PMID: 26025808 DOI: 10.1016/j.optom.2015.04.001

PURPOSE: To determine the influence of age and gender on macular sensitivity to light in healthy subjects of 4 age groups using the MP-1 microperimeter.
METHODS: A prospective study was carried out on 50 healthy subjects (age range: 18-60 years) divided into 4 age groups; 18-30 years, 31-40 years, 41-50 years and 51-60 years. Full-threshold microperimetry of the central 10° of retina was performed utilizing 32 points with the MP-1. Macula area was divided into four quadrants, which were superior nasal (SN), inferior nasal (IN), inferior temporal (IT) and superior temporal (ST).
RESULTS: Total mean sensitivity at 10° for age groups 18-30 years, 31-40 years, 41-50 years and 51-60 years were 19.46 ± 0.30, 19.40 ± 0.39, 19.47 ± 0.35 and 18.73 ± 0.75 (dB), respectively. There was a significant difference in total mean retinal sensitivity at 10° and at the four quadrants with age but not for gender. The retinal sensitivity was highest in the IT quadrant and lowest in the SN quadrant for all age groups. The linear regression analysis revealed that there was a 0.019 dB, 0.016 dB, 0.022 dB, 0.029 dB and 0.029 dB per year age-related decline in mean macular sensitivity within the central 10° diameter in the SN, IN, IT and ST quadrants respectively.
CONCLUSION: Among normal healthy subjects, there was a linear decline in retinal light sensitivity with increasing age with the highest reduction in the superior nasal quadrant and lowest in the inferior temporal quadrant.

Matched MeSH terms: Macula Lutea/physiology*
Retinal findings in adult leukaemia: correlation with leukocytosis

Jackson N, Reddy SC, Hishamuddin M, Low HC

Clin Lab Haematol, 1996 Jun;18(2):105-9.
PMID: 8866143

The associations between retinal findings and haematological parameters in acute leukaemia are controversial. Sixty-three newly-diagnosed acute leukaemia patients, aged 12-77 years, were studied prospectively for the presence of intra-retinal haemorrhages (IRH), white-centred haemorrhages (WCH), cotton wool spots (CWS) and macular haemorrhages (MH), Thirty-three patients (52.4%) showed at least one retinal abnormality. The prevalence of individual findings was: IRH (30 cases), WCH (20 cases), CWS (5 cases), MH (11 cases). In contrast to previous studies, there was no association between any of these retinal findings and the haemoglobin level or the platelet count. There was a higher median WBC in patients with IRH (68 x 10(9)/l) than in those without IRH (15.4 x 10(9)/l), P = 0.037. When the acute myeloblastic leukaemia cases were considered separately, an association was also found between higher WBC and the presence of WCH and CWS. There was no association between retinal findings and FAB type in the AML cases. We conclude that a high WBC may be at least as important as anaemia and thrombocytopenia in the pathogenesis of the retinopathy of acute leukaemia.

Matched MeSH terms: Macula Lutea/pathology
Optical Coherence Tomography Angiography of Optic Disc and Macula Vessel Density in Glaucoma and Healthy Eyes

Yip VCH, Wong HT, Yong VKY, Lim BA, Hee OK, Cheng J, et al.

J Glaucoma, 2019 01;28(1):80-87.
PMID: 30461553 DOI: 10.1097/IJG.0000000000001125

AIM: To study the microvascular density of the macular and optic nerve head in healthy and glaucoma subjects using optical coherence tomography angiography.
METHODOLOGY: We performed a cross-sectional cohort study on healthy subjects and patients with glaucoma. The AngioVue Enhanced Microvascular Imaging System was used to capture the optic nerve head and macula images during one visit. En face segment images of the macular and optic disc were studied in layers. Microvascular density of the optic nerve head and macula were quantified by the number of pixels measured by a novel in-house developed software. Areas under the receiver operating characteristic curves (AUROC) were used to determine the accuracy of differentiating between glaucoma and healthy subjects.
RESULTS: A total of 24 (32 eyes) glaucoma subjects (57.5±9.5-y old) and 29 (58 eyes) age-matched controls (51.17±13.5-y old) were recruited. Optic disc and macula scans were performed showing a greater mean vessel density (VD) in healthy compared with glaucoma subjects. The control group had higher VD than the glaucoma group at the en face segmented layers of the optic disc (optic nerve head: 0.209±0.05 vs. 0.110±0.048, P<0.001; vitreoretinal interface: 0.086±0.045 vs. 0.052±0.034, P=0.001; radial peripapillary capillary: 0.146±0.040 vs. 0.053±0.036, P<0.001; and choroid: 0.228±0.074 vs. 0.165±0.062, P<0.001). Similarly, the VD at the macula was also greater in controls than glaucoma patients (superficial retina capillary plexus: 0.115±0.016 vs. 0.088±0.027, P<0.001; deep retina capillary plexus: 0.233±0.027 vs. 0.136±0.073, P<0.001; outer retinal capillary plexus: 0.190±0.057 vs. 0.136±0.105, P=0.036; and choriocapillaris: 0.225±0.053 vs. 0.153±0.068, P<0.001. The AUROC was highest for optic disc radial peripapillary capillary (0.96), followed by nerve head (0.92) and optic disc choroid (0.76). At the macula, the AUROC was highest for deep retina (0.86), followed by choroid (0.84), superficial retina (0.81), and outer retina (0.72).
CONCLUSIONS: Microvascular density of the optic disc and macula in glaucoma patients was reduced compared with healthy controls. VD of both optic disc and macula had a high diagnostic ability in differentiating healthy and glaucoma eyes.

Matched MeSH terms: Macula Lutea/blood supply*
Fulltext Central scotoma at near top of Mount Everest – a case report of bilateral high altitude retinopathy

Nazrina Hassan, Yong Meng Hsien, Wan Haslina Wan Abdul Halim, Norshamsiah Md Din

Malaysian Journal of Medicine and Health Sciences, 2019;15(106):94-94.
MyJurnal

Introduction: High altitude retinopathy (HAR) is part of high altitude illness (HAI) which includes acute mountain sickness, high altitude cerebral oedema and pulmonary oedema. We present a case of bilateral HAR with right eye central scotoma during Mount Everest expedition. Case description: A 37-year-old lady presented with decreased right eye (OD) vision and central scotoma during ascending to the top of Mount Everest at 5100m. She developed respiratory symptoms with shortness of breath at the same time and warranted her a rapid descend on day eight of her excursion. Ocular examination revealed visual acuity of 6/36 OD and 6/6 left eye (OS). Both pupils were normal without relative afferent pupillary defect. Anterior segment and intraocular pressure were unremarkable. Fundus examination revealed bilateral multiple retinal haemorrhages along vascular arcades, with macula involvement in the right eye only. Otherwise there was no sign of optic disc swelling, vascular sheathing or choroidal involvement. Optical coherence tomography (OCT) of the macula showed hyperreflectivity changes on the right fovea at the level of superficial nerve fiber layer. Diagnosis of bilateral HAR was made and treated conservatively. She was also diag-nosed with HAI with acute pulmonary oedema and pneumonia by the treating physician. The retinal haemorrhages started to resolve after two weeks with full recovery of vision in ten weeks. Conclusion: With increasing popularity of mountaineering, ophthalmologists should be prepared to recognise HAR as part of HAI. Visual impairment depends on the location and extent of the lesions. HAR is self-limiting with good prognosis but can be associated with poten-tially fatal conditions of HAI e.g. pulmonary oedema in our case.

Matched MeSH terms: Macula Lutea
Fulltext Macular branch retinal vein occlusion: a revisit and case report

Azhan, A., Mutasim, H., Abdul-Hadi, R., Khairul-Anwar, I., Zunaina, E.

Journal of Biomedical and Clinical Sciences, 2018;3(2):18-21.
MyJurnal

Macular branch retinal vein occlusion (BRVO), a type of retinal vein occlusion, is rarely recognised as a distinct entity. Macular BRVO has unique clinical features and different natural courses than the major BRVO. We report a case of a young patient with macular BRVO with macular oedema who was successfully treated with intravitreal ranibizumab injection. A 43 year-old Chinese man with no underlying medical illness presented with 2 weeks history of left eye painless reduced central vision which was worsening over time. On examination, his left eye visual acuity was 6/30 and Amsler chart drawing showed a lower central scotoma. Dilated fundus examination found marked flame-shaped retinal hemorrhages with cotton wool spot over the superior macular area bounded superiorly by superior arcade and macular thickening. An optical coherence tomography revealed cystoid macular oedema; and fundus fluorescein angiography showed occlusion of a small venous branch draining a superior part of macula to superior temporal venous arcade. A complete medical investigation found that he has hypertriglyceridemia and he was managed accordingly. His vision had improved to 6/6 after receiving 3 injections of intravitreal ranibizumab with no residual central scotoma and complete resolution of macular oedema.

Matched MeSH terms: Macula Lutea
Fulltext Hemangioblastoma in the setting of von hippel lindau disease: a case report

Raajini Devi K, Aida Zairani MI, Hazlita MI, Jemaima CH, Farizal F, Safinaz Mohd Khialdin

Journal of Surgical Academia, 2016;6(1):54-58.
MyJurnal

A 21-year-old Chinese gentleman with no known medical illness, presented with a history of right painless blurring of vision with central scotoma of two weeks duration. He also had a history of multiple episodes of seizures prior to presentation. Visual acuity was 1/60 with unremarkable anterior segment findings and no relative afferent pupillary defect. Fundus examination of the right eye revealed dilated and tortuous retinal veins with multiple retinal capillary hemangiomas and sub retinal hard exudates at the macula with edema. A diagnosis of Von Hippel Lindau disease was made when a posterior fossa mass suggestive of hemangioblastoma with obstructive hydrocephalus was seen on computed tomography of the brain. Craniotomy with nodule excision was performed. The retinal capillary hemangiomas were treated with the combination of laser photocoagulation and intravitreal Ranibizumab injections. Visual acuity subsequently improved to 6/36.

Matched MeSH terms: Macula Lutea