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Fixation switch and diplopia after full macular translocation surgery.
Sandra Holgado1, Cynthia A Toth, Sharon F Freedman
1Duke University Eye Center, Durham, North Carolina 27710, USA.
Summary
A fixation switch to the poorer-seeing eye can occur after macular translocation surgery (MT360), leading to persistent diplopia. This condition, even with successful surgery, proves challenging to manage effectively.
Area of Science:
- Ophthalmology
- Strabismus Surgery
- Vision Science
Background:
- Macular translocation surgery (MT360) aims to improve vision in certain eye conditions.
- Post-surgical outcomes require careful evaluation, particularly regarding visual fixation and binocularity.
Purpose of the Study:
- To identify and evaluate treatment for patients experiencing persistent diplopia after MT360 and extraocular muscle surgery.
- To analyze fixation preference and its relationship with diplopia 6-12 months post-surgery.
Main Methods:
- Prospective study including patients who underwent MT360 and extraocular muscle surgery.
- Sensorimotor examinations and analysis of visual acuity and fixation preference were performed.
- Data collected 6 to 12 months after MT360 and extraocular muscle surgery.
Main Results:
- Most patients (86%) fixated with the better-seeing eye after surgery.
- A small percentage (6%) fixated with the operated eye despite poorer acuity.
- 8% experienced a fixation switch to the poorer-seeing fellow eye, resulting in diplopia.
Conclusions:
- Fixation switch to the poorer-seeing eye is a potential complication after MT360.
- Diplopia resulting from this switch is difficult to treat effectively.
- Successful visual outcomes in the operated eye do not preclude fixation issues.
