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Efficacy of perceptual learning among patients with infantile nystagmus: a prospective single-blind randomised
Idan Hecht1,2, Claudia Yahalom3, Ora Abaev4
1Department of Ophthalmology, Shamir Medical Center, Zerifin, Israel idanhe@gmail.com.
Insights
Repeated visual stimulation with Gabor patches significantly improved vision in patients with infantile nystagmus. This non-invasive treatment enhanced visual acuity and stereopsis, offering a promising option for vision improvement.
Area of Science:
- Ophthalmology
- Neuroscience
- Vision Science
Background:
- Infantile nystagmus (IN) presents limited effective treatment options.
- Visual perceptual learning is being explored as a potential therapeutic strategy for IN.
Purpose of the Study:
- To evaluate the efficacy of repeated visual stimulation using Gabor patches in improving vision in patients with infantile nystagmus.
Main Methods:
- A prospective, randomized, single-blind study (3:1 ratio) involving 36 patients (9-55 years) with IN.
- The treatment group received approximately 4 months of visual stimulation (30 min, 3-4 times/week) via web-based software.
- Control group received no treatment during the study period.
Main Results:
- 46% of treated patients achieved driving-standard visual acuity (20/40) versus 10% of controls.
- Significant improvements were observed in distance and near best-corrected visual acuity (BCVA) in the treatment group (p<0.001 and p=0.040, respectively).
- 88% of treated patients without prior stereopsis gained the ability, compared to 25% of controls (p=0.10).
Conclusions:
- Visual perceptual learning with Gabor patches effectively improved visual acuity and stereopsis in patients with infantile nystagmus.
- This non-invasive visual stimulation approach shows promise as a novel treatment for enhancing visual function in IN.
- Further research may establish this as a viable therapeutic option for individuals with infantile nystagmus.
Background:
There are limited treatment options to improve vision in patients with infantile nystagmus. We aimed to examine the use of repeated visual stimulation with Gabor patches to improve vision.
Methods:
A prospective randomised (3:1) controlled single-blind study. Included were patients aged 9-55 years with infantile nystagmus, treated in one tertiary referral centre in central Israel. The treatment group underwent visual stimulation for 4 months, which consisted of treatment sessions of approximately 30 min, 3-4 times a week, using web-based dedicated software. Controls were followed without treatment.
Results:
26 patients were treated, and 10 served as controls. Mean age was 22.47±12 years. 12/26 (46%) of treated subjects achieved driving licence best corrected visual acuity (BCVA) (20/40) versus 1/10 (10%) of controls. Distance BCVA improved by 0.11±0.07 logMAR (one line) in treated patients compared with 0.013±0.06 logMAR in controls (p<0.001). Near BCVA improved by 0.20±0.18 logMAR (2 lines) in treated patients compared with 0.06±0.06 logMAR in controls (p=0.040). 88% (8/9) of study patients who had no stereopsis prior to treatment achieved stereopsis (mean 630') as opposed to 25% (1/4) of controls (p=0.10). Mean stereoacuity and contrast sensitivity improved by 802±730' and 292±391% in the study group as opposed to 246±376' and 152±67% in controls, respectively (p=0.031; p=0.157).
Conclusions:
Visual perceptual learning using Gabor patches resulted in a significant improvement in near and distance visual acuity, as well as stereopsis. This modality may represent a promising non-invasive treatment option for improving visual function in patients with infantile nystagmus.
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