This prospective longitudinal observational study aims to assess stereopsis recovery in strabismic patients at one month and three months post-corrective surgery. The study will be conducted at Mayo Hospital, Lahore, and Sajjad Eye Center, Burewala, with a sample size of 34 using a purposive sampling technique. Eligible participants include patients aged ≥5 years undergoing strabismus surgery for esotropia, exotropia, or vertical deviations, with best-corrected visual acuity (BCVA) of 6/12 in both eyes. Patients with previous strabismus surgery, amblyopia, neurological conditions, or sensory strabismus will be excluded.
Baseline assessments include visual acuity (Snellen Chart), ocular alignment (cover-uncover and prism cover tests), and stereopsis (Titmus Fly Test). The same tests will be repeated one month and three months post-surgery to evaluate changes. The study aims to determine whether strabismus surgery enhances binocular function and stereopsis, helping guide future treatment strategies. Data will be analyzed using paired t-tests to assess differences over time.
Study Type
OBSERVATIONAL
Enrollment
34
This prospective longitudinal observational study aims to assess stereopsis recovery in strabismic patients at one month and three months post-corrective surgery
CENUM Center Mayo Hospital Rd, Anarkali Bazaar
Lahore, Punjab Province, Pakistan
Titmus fly test
It is a contour stereo test performed at distance of 40cm. the test comprises of 3 sections: 1. The housefly which shows large disparities and should be seen in depth by most subjects. Stereoacuity range of Random Dot Butterfly is * Bottom of lower wing: 1150 sec of arc * Tip of abdomen: 700 sec of arc * Top of upper wing: 2000 sec of arc 2. There are 3 rows of animals, one animal in each row having a crossed disparity which ranges from 100, 200, 400 secs of arc. 3. Circle patterns: this section consists of 9 patterns containing four circles. The disparities of the circles range from 800 to 40 secs of arc.
Time frame: 12 Months
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