By Chong Wee Hou, IECRC

Binocular vision involves using two eyes with overlapping fields of view. After integration in the visual cortex, it results in one single vision view of the world around us and the perception of depth.

Ms Rachel Kelly, consultant optometrist from IGARD Group Singapore, gave a lecture on “Binocular Vision: What Eye Care Professionals Should Know” during the inaugural Singapore Primary Eye Care Symposium (SPECS) held at One Farrer Hotel & Spa on 11 to 12 September 2017.

Ms Kelly’s lecture covered the visual pathway and the relationship between eye movement and extraocular muscles. The six extraocular muscles that control movement of the eye are the superior rectus, inferior rectus, medial rectus, lateral rectus, superior oblique muscle and inferior oblique muscle. These extraocular muscles are innervated by cranial nerves III, IV and VI. A detailed ophthalmic examination can often identify abnormalities in individual muscles or affected cranial nerves.

Ms Kelly also shared the classification and assessment of strabismus. She concluded her talk with tips on tests in patients with binocular vision problems such as using the Worth Four Dots in different optometric settings.