Gani, Nor Hasnida Ab (2021) Evaluation of stereopsis and fusion in patients with vestibular vertigo. Masters thesis, Universiti Sains Malaysia.
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Abstract
Introduction: Fusion and stereopsis are components of binocular vision in which the stereopsis is the highest grade. Various studies showed that binocular vision dysfunction is one of the causes that contribute to refractory vestibular vertigo due to the presence of fixation disparity and reduced stereopsis. Binocular vision is an important factor for postural stability. Normal binocular vision is required to retain stable visual image on retina during vestibulo-ocular reflex. Thus the presence of binocular vision dysfunction in vertigo warrants an evaluation. Objective: To compare the means of stereopsis and fusional vergence between the patients with vestibular vertigo and control subjects. Methodology: A comparative cross-sectional study was conducted in the Ophthalmology Clinic, Hospital Universiti Sains Malaysia, Kelantan from January 2019 till February 2021 among patients with vestibular vertigo patients and the control group. 57 patients included in this study with 57 controls who are in the same age range of 30 to 60 years old. Both groups were evaluated for stereopsis and fusion vergence amplitude once fulfilled the required criteria. The far and near stereopsis were tested using M&S Smart System II PC-Plus and Titmus Test respectively. Fusional vergence was measured using a prism bar. Results: Parametric analysis of stereopsis revealed a statistically significant difference of mean stereopsis at near (p<0.05) and an insignificant difference in mean stereopsis at far (p>0.05) between vestibular vertigo patients and the control group. Independent t test showed statistically significant difference of mean fusional vergence measurement (p<0.05) between these two groups which consists of near and far of negative and positive fusional vergence for break and recovery point. Conclusion: There was statistically significant difference in mean near stereopsis and fusional vergence between patients with vestibular vertigo and the control group. However, there was no significant difference in mean for far stereopsis.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | stereopsis |
| Subjects: | R Medicine R Medicine > RE Ophthalmology |
| Divisions: | Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Perubatan (School of Medical Sciences) > Thesis |
| Depositing User: | MUHAMMAD AKIF AIMAN AB SHUKOR |
| Date Deposited: | 11 Jun 2026 06:29 |
| Last Modified: | 30 Aug 2026 06:50 |
| URI: | http://eprints.usm.my/id/eprint/64345 |
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