Publications by authors named "Muhammed S Alluwimi"
Childhood visual impairment causes and barriers to accessing eye care: A suggested approach for Africa.
Afr J Prim Health Care Fam Med
July 2024
Background: Childhood vision impairment (VI) has a significantly harmful effect on both health and social outcomes.
Aim: To assess the causes of childhood VI, to determine obstacles to accessing eye care services and to develop a strategy for the childhood eye care system in African nations.
Method: This systematic review was conducted by searching several online databases, including; Scopus, PubMed, ProQuest, Web of Science, Google Scholar, Ebsco and Medline.
Purpose: To develop criteria to predict visual hemifields with deep perimetric defects based on retinal nerve fibre layer (RNFL) reflectance, in a transparent process whose components can be assessed by independent laboratories analysing data from their own small groups.
Methods: The analysis was carried out in four stages, using three independent groups of patients-30, 33 and 62 participants-with glaucoma and age-similar controls. The first stage used Group 1 to develop a criterion for RNFL reflectance images at 24, 36 or 48 μm below the inner limiting membrane (ILM).
Article Synopsis
- A new method was developed to assess the relationship between structural changes in the retinal nerve fiber layer (RNFL) and functional defects in patients with glaucoma, focusing on a larger area of the retina (central 30°).
- The study involved 44 glaucoma patients who underwent Optical Coherence Tomography (OCT) and visual field testing (perimetry) to gather data on RNFL defects and corresponding visual field loss.
- Results indicated a high correlation between RNFL defects and visual field deficits, with 78% of locations showing both abnormalities, suggesting this method can enhance the understanding of structure-function relationships in glaucoma.
Significance: Identifying glaucomatous damage to the macula has become important for diagnosing and managing patients with glaucoma. In this study, we presented an approach that provides better perimetric sampling for the macular region, by testing four locations, with a good structure-function agreement.
Purpose: We previously presented a basis for customizing perimetric locations within the macula.
Purpose: To assess the effects of 0.5% and 1% cyclopentolate on the main parameters of the anterior segment (central corneal thickness (CCT), anterior chamber angle (ACA), depth (ACD) and volume (ACV)) in low/moderate myopia and hyperopia along with the effect on IOP.
Patients And Methods: Both eyes of 30 subjects (15 myopic and 15 hyperopic) with mean age±standard deviation of 21.
Purpose: Prior studies suggested the use of customized perimetric locations in glaucoma; these studies were limited by imaging only the superficial depths of the retinal nerve fiber layer (RNFL) and by prolonged perimetric testing. We aimed to develop a rapid perimetric test guided by high-resolution images of RNFL bundles.
Methods: We recruited 10 patients with glaucoma, ages 56 to 80 years, median 68 years, and 10 controls, ages 55 to 77 years, median 68 years.
Significance: Measurements of the macula have been increasingly used to diagnose and manage patients with glaucoma. Asymmetry analysis was clinically introduced to assess damage to the macular ganglion cells in patients with glaucoma, but its effectiveness is limited by high normal between-subject variability.
Purpose: We aimed to reduce the high normal between-subject variability and improve the potential of asymmetry analysis to identify glaucomatous damage to the macula.
A basis for customising perimetric locations within the macula in glaucoma.
Ophthalmic Physiol Opt
March 2018
Purpose: It has been recognised that the 24-2 grid used for perimetry may poorly sample the macula, which has been recently identified as a critical region for diagnosing and managing patients with glaucoma. We compared data derived from patients and controls to investigate the efficacy of a basis for customising perimetric locations within the macula, guided by en face images of retinal nerve fibre layer (RNFL) bundles.
Methods: We used SD-OCT en face montages (www.
Purpose: To investigate the use of asymmetry analysis to reduce between-subject variability of macular thickness measurements using spectral domain optical coherence tomography.
Methods: Sixty-three volunteers (33 young subjects [aged 21 to 35 years] and 30 older subjects [aged 45 to 85 years]) free of eye disease were recruited. Macular images were gathered with the Spectralis optical coherence tomography.