Che Arif, Fatin Amalina and Shafee, Noor Wafirah and Che Azemin, Mohd Zulfaezal and Ahmad, Norsham (2025) Evaluation of fixation and smooth pursuit eye movement in non-amblyopic anisometropic children. Revelation and Science, 2 (1). pp. 13-22. ISSN 2229-9645 E-ISSN 2229-9947
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Abstract
Anisometropia is a refractive condition characterised by a greater refractive error in one eye than the other. If left untreated, this condition potentially disrupts bifoveal fusion and impacts children’s visual development and eye movement control. Current studies focus on eye movements in anisometropic amblyopia, but little is known about the effect of anisometropia on non-amblyopic children. Thus, the present study aimed to examine the eye movement characteristics in non-amblyopic anisometropia children, and to compare the characteristics with the control group. Fifteen children with non-amblyopic anisometropia and 15 healthy controls underwent horizontal smooth pursuit (SP) and fixation eye movement recordings using the Tobii Pro Fusion-120Hz eye tracker. SP gain and SP root mean square error (RMSE) were calculated to evaluate SP performance, while fixation performance was assessed by dwell time percentage. The SP gain for non-anisometropic and anisometropic children was 0.980±0.046 and 0.973±0.082, respectively. The RMSE was 1.803±0.149 for non-anisometropic children and 2.266±0.318 for anisometropic children. An independent t-test showed a significant difference in RMSE (p<0.001) but no difference in SP gain (p=0.793). The Mann-Whitney test revealed that non-anisometropic children-maintained fixation within 2° of the target center longer than anisometropic children (p=0.004). Anisometropic children have greater difficulty maintaining stable eye fixation compared to non-anisometropic children, indicated by higher tracking errors and less time spent within the area of interest. However, their SP gain is like non-anisometropic children
| Item Type: | Article (Journal) |
|---|---|
| Uncontrolled Keywords: | Anisometropia, eye movement, fixation stability, gain, smooth pursuit |
| Subjects: | R Medicine > R Medicine (General) R Medicine > RE Ophthalmology R Medicine > RE Ophthalmology > RE88 Ophthalmic nursing (Including eye, ear, nose and throat combined) |
| Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): | Kulliyyah of Allied Health Sciences > Department of Optometry and Visual Science |
| Depositing User: | Fatin Amalina Che Arif |
| Date Deposited: | 11 Jun 2025 17:07 |
| Last Modified: | 11 Jun 2025 17:07 |
| URI: | http://irep.iium.edu.my/id/eprint/121453 |
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