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A Method to Quantify Visual Information Processing in Children Using Eye Tracking
Published on: July 9, 2016
Causes of visual impairment in children with low vision
Mufarriq Shah1, Mirzaman Khan, Muhammad Tariq Khan
1Department of Ophthalmology, Hayatabad Medical Complex, Peshawar. mufarriq1@hotmail.com
Insights
Retinal diseases like nystagmus and macular conditions are primary causes of low vision in children. Early intervention with spectacles and low vision devices (LVDs) significantly improves vision for affected children.
Area of Science:
- Ophthalmology
- Pediatric Ophthalmology
- Low Vision Research
Background:
- Low vision in children presents significant challenges to development and education.
- Identifying the causes and effective interventions is crucial for improving quality of life.
Purpose of the Study:
- To identify the primary causes of visual impairment in children with low vision.
- To assess the need for spectacles and low vision devices (LVDs).
- To evaluate the visual outcomes after using LVDs for different distances.
Main Methods:
- An observational study was conducted involving 270 children aged 4-16 years with low vision.
- Participants attended the Low Vision Clinic between June 2006 and December 2007.
- Visual acuity was assessed after correction, and WHO criteria classified visual impairment levels.
Main Results:
- Nystagmus (15%), Stargardt's disease (14%), and maculopathies (13%) were leading causes of visual impairment.
- 33.8% were visually impaired, 27.2% severely visually impaired, and 39.0% blind.
- Spectacles and/or telescopes were prescribed to 179 patients, with positive visual outcomes noted.
Conclusions:
- Hereditary and congenital retinal diseases, including nystagmus and macular conditions, are major contributors to childhood low vision.
- Refraction and low vision services, including LVDs, are beneficial for enhancing vision and promoting inclusive education for visually impaired children.
Objective:
To determine the main causes of visual impairment in children with low vision. To assess the need of spectacles and low vision devices (LVDs) in children and to evaluate visual outcome after using their LVDs for far and near distance.
Study Design:
Observational study.
Place And Duration Of Study:
Khyber Institute of Ophthalmic Medical Sciences, Peshawar, Pakistan, from June 2006 to December 2007.
Methodology:
The clinical record of 270 children with low vision age 4-16 years attending the Low Vision Clinic were included. All those children, aged 4-16 years, who had corrected visual acuity (VA) less than 6/18 in the better eye after medical or surgical treatment, were included in the study. WHO low vision criteria were used to classify into visually impaired, severe visually impaired and blind. Results were described as percentage frequencies.
Results:
One hundred and eighty nine (70%) were males and 81 (30%) were females. The male to female ratio was 2.3:1. The main causes of visual impairment included nystagmus (15%), Stargardt's disease (14%), maculopathies (13%), myopic macular degeneration (11%) and oculocutaneous albinism (7%). The percentages of visually impaired, severe visually impaired and blind were 33.8%, 27.2% and 39.0% respectively. Spectacles were prescribed to 146 patients and telescopes were prescribed to 75 patients. Spectacles and telescope both were prescribed to 179 patients while Ocutech telescope was prescribed to 4 patients.
Conclusion:
Retinal diseases nystagmus and macular conditions were mainly responsible for low vision in children. Visually impaired children especially with hereditary/congenital ocular anomalies benefit from refraction and low vision services which facilitate vision enhancement and inclusive education.
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