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Morphological changes in the optic disc after vitrectomy and fluid-air exchange.
Hirokazu Ohashi1, Yuzo Kasuga, Naruhiko Hata
1Department of Ophthalmology, Tenri Yorozu Hospital, 200 Mishimacho, 632-8552, Tenri city, Nara, Japan. oha@kuhp.kyoto-u.ac.jp
Summary
Vitrectomy with fluid-air exchange can alter optic disc morphology, decreasing cup-to-disc ratio and increasing rim volume. These changes occur without causing visual field loss in patients undergoing surgery for macular holes or epiretinal membranes.
Area of Science:
- Ophthalmology
- Retinal Surgery
Background:
- Vitrectomy is associated with ocular complications, but optic disc morphological changes remain understudied.
- Limited data exists on the impact of vitrectomy and fluid-air exchange on optic disc structure post-surgery.
Purpose of the Study:
- To investigate the post-operative morphological changes in the optic disc after vitrectomy.
- To specifically evaluate the effect of fluid-air exchange during vitrectomy on optic disc morphology.
Main Methods:
- Retrospective analysis of 31 eyes undergoing vitrectomy for macular holes or epiretinal membranes.
- Optic disc morphology assessed using Heidelberg Retina Tomograph.
- Comparison between eyes with and without fluid-air exchange.
Main Results:
- Fluid-air exchange during vitrectomy led to significant decreases in C/D area ratio and cup volume, with increased rim volume and cup depth.
- Eyes without fluid-air exchange showed no significant optic disc morphological changes.
- No post-operative visual field loss was observed in any patient.
Conclusions:
- Vitrectomy, particularly when combined with fluid-air exchange, induces significant and lasting morphological changes in the optic disc.
- These optic disc alterations occur without compromising post-operative visual function.
- Fluid-air exchange is a key factor influencing optic disc morphology post-vitrectomy.