Strabismic Amblyopia, Bilateral
Conditions
Brief summary
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.
Detailed description
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.
Interventions
COMBINATION_PRODUCTStereopsis Recovery
This prospective longitudinal observational study aims to assess stereopsis recovery in strabismic patients at one month and three months post-corrective surgery
Sponsors
Superior University
Study design
Observational model
CASE_CONTROL
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
5 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patients (≥5 years and adults) undergoing strabismus surgery for: esotropia, exotropia, vertical deviations (hypertropia or hypotropia) * Best corrected visual acuity (BCVA) of 6/12 in both eyes * Willingness to attend follow-up visits at 1 month and 3 months post-surgery.8
Exclusion criteria
* History of previous strabismus surgery * Amblyopia * Neurological and systemic conditions affecting vision * Uncontrolled nystagmus and sensory strabismus * Patients unable to complete stereopsis testing due to cognitive or physical limit
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Titmus fly test | 12 Months | 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. |
Countries
Pakistan
Outcome results
None listed