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Visual acuity improvement in children with albinism beyond the first decade of life
Claudia Yahalom1,2, Ana Navarrete2, Atara Juster2
1Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel.
Insights
Visual acuity in children with albinism improves into their second decade. This late visual maturation in albinism is not linked to nystagmus or surgery, offering insights for patient care.
Area of Science:
- Ophthalmology
- Genetics
- Pediatrics
Background:
- Albinism encompasses a group of genetic disorders characterized by a lack of pigment.
- Visual development in children with albinism typically plateaus early, but late maturation is possible.
Purpose of the Study:
- To investigate if visual maturation continues beyond age 10 in children with albinism.
- To determine if this visual development correlates with albinism type, nystagmus, eye muscle surgery, or refractive errors.
Main Methods:
- Retrospective case series of 75 children with genetically confirmed albinism.
- Data collected included albinism type, visual acuity, nystagmus, and surgical history across four age groups (7-9, 10-12, 13-16, >16).
Main Results:
- Significant visual acuity improvement (average 2 lines) was observed between ages 7-9 and 13-16 in patients with Oculocutaneous Albinism types 1A and 2.
- This improvement occurred across major albinism types studied (OCA1A, OCA1B, OCA2).
- No correlation was found between visual gains and refractive errors, nystagmus, or prior eye muscle surgery.
Conclusions:
- Visual performance can improve into the second decade of life for children with albinism.
- The underlying mechanisms for this late maturation remain unclear, potentially involving delayed foveal development or nystagmus changes.
- Findings provide valuable information for clinicians and parents managing albinism.
Purpose:
To determine if visual maturation continues beyond the first decade of life in children with albinism and whether this is related to albinism type, presence of nystagmus, eye muscle surgery or refractive errors.
Design:
Case series based on retrospective study of children with confirmed genetic diagnosis of albinism.
Methods:
Clinical data were obtained from medical files of children examined during school years, including albinism type, visual acuity, eye muscle surgery, nystagmus, and others on different visits (Visit 1: ages 7-9; Visit 2: ages: 10-12; Visit 3: ages 13-16; Visit 4: ages >16).
Results:
Seventy-five children with albinism were included in the study. Patients were divided into different groups according to the albinism type including OCA1A: 17; OCA1B: 28; OCA2: 26; HPS: 3; OCA4: 1. Follow-up ranged from 3-13 years. Progressive visual acuity improvement was seen in all three main groups. T-test paired samples showed a statistically significant improvement when comparing vision from Visit 1 and Visit 3 in both OCA1A and OCA2 groups, with a mean vision improvement of 2 lines. There was no correlation between visual improvement and refractive error, eye muscle surgery or nystagmus.
Conclusion:
An improved visual performance was seen in a large percentage of children with albinism during the second decade of life. The reason for this late improvement in vision is not clear but may be related to late foveal maturation or improvement in nystagmus with time. This information is useful for clinicians of these patients and when counseling parents.
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