Surgical Correction of V Pattern Intermittent Exotropia Without Inferior Oblique Muscle Overaction

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-08-30

Study Completion Date

2024-08-30

Brief Summary

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Evaluation of the results of surgical correction of V pattern intermittent exotropia without inferior oblique muscle overaction by either performing bilateral lateral rectus recession (BLR) alone or performing bilateral lateral rectus recession asssosiated with upward transposition of lateral rectus muscle insertion

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Detailed Description

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Intermittent exotropia (IXT) is the most common type of strabismus which is a disorder of binocular eye movement control in which one eye intermittently moves outwards.Intermittent exotropia may be associated with difference in the horizontal deviation from the primary position to the upward or downward gaze giving A or V pattern In V-pattern intermittent exotropia (XT), there is an increase in the horizontal deviation as the eyes move from downgaze to upgaze.

Non-surgical treatment includes correction of refractive error, orthoptics, overcorrecting minus lenses and prismotherapy. Surgical options includes unilateral medial rectus muscle resection combined with a lateral rectus muscle recession or bilateral lateral rectus recession as in basic type IXT OR bilateral lateral rectus muscle recession as in divergent excess type OR bilateral medial rectus muscle resection as in convergence insufficiency.

Conditions

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Surgical Correction V Pattern Intermittent Exotropia Inferior Oblique Muscle Overaction

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Bilateral Lateral Rectus Recession (BLR Recession)

Participants underwent bilateral lateral rectus recession procedure alone for correction of large-angle exotropia.

Group Type EXPERIMENTAL

Bilateral Lateral Rectus Recession (BLR Recession)

Intervention Type PROCEDURE

This procedure involved recession of both lateral rectus muscles to reduce large-angle exotropia.

Bilateral Lateral Rectus Recession with Upward Transposition

Participants underwent bilateral lateral rectus recession combined with upward transposition of the muscle insertion to enhance alignment in cases of large-angle exotropia.

Group Type EXPERIMENTAL

Bilateral Lateral Rectus Recession with Upward Transposition

Intervention Type PROCEDURE

This procedure involved bilateral lateral rectus recession combined with upward transposition of the insertion to enhance ocular alignment in patients with large-angle exotropia.

Interventions

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Bilateral Lateral Rectus Recession (BLR Recession)

This procedure involved recession of both lateral rectus muscles to reduce large-angle exotropia.

Intervention Type PROCEDURE

Bilateral Lateral Rectus Recession with Upward Transposition

This procedure involved bilateral lateral rectus recession combined with upward transposition of the insertion to enhance ocular alignment in patients with large-angle exotropia.

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* Patients with V pattern intermittent exotropia (XT increasing by \>10Δ in upgaze compared with Downgaze).
* No or minimal inferior oblique overaction on both sides (+1)
* Minimum follow-up period of 6 months after surgical correction of strabismus

Exclusion Criteria

* Structural eye pathology.
* Significant neurodevelopmental delay.
* ntermittent exotropia without V pattern.
* Superior oblique under action.
* Duane syndrome.
* Less than 6 months follow up.

Minimum Eligible Age

5 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes