1. A Novel Device for Vergence Exercises: Testing Automatic Dual Rotational Risley Prisms on Asymptomatic Adults and Patients with Convergence Insufficiency
- Author
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Ya-Yu Chen, Yun-Shao Hu, Shuan-Yu Huang, and Tzu-Hsun Tsai
- Subjects
Automatic dual rotational Risley prisms ,Convergence ,Vergence abilities ,Vergence exercises ,Convergence insufficiency ,Ophthalmology ,RE1-994 - Abstract
Abstract Introduction This study investigated the effects of automatic dual rotational Risley prisms (ADRRPs), a mobile phone application-operated device, on vergence abilities in young adults. Methods Fifty-six participants aged 20–24 performed vergence exercises. The test group used prisms with power changes from 30Δ base-out to 10Δ base-in, while the control group used plano lenses for 10 min. Ophthalmic examinations included lateral heterophoria, near point of convergence (NPC), vergence facility (VF), negative fusional vergence (NFV), and positive fusional vergence (PFV), all measured before and after the vergence exercises. Pre- and post-test results were analyzed using a paired sample t test. Additionally, three cases with convergence insufficiency (CI) performed similar exercises for 12 weeks. Results Participants were divided into the test group (n = 39; age 21.82 ± 1.10 years) and control group (n = 17; age 20.53 ± 0.51 years). In the test group, NPC improved from 6.11 ± 2.52 cm to 5.77 ± 2.30 cm (p = 0.023). VF increased from 13.75 ± 4.10 cpm to 16.50 ± 4.42 cpm (p = 0.007). PFV at 6 m and 0.4 m increased from 19.49 ± 6.77∆ to 22.19 ± 6.64∆ (p
- Published
- 2024
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