RESUMO
PURPOSE: To investigate, with spectral-domain optical coherence tomography, if the preoperative status of the retinal pigment epithelium (RPE) affects the postoperative foveal morphology and visual outcomes in eyes with surgically closed macular holes (MHs). METHODS: In 52 eyes with surgically closed MHs, preoperative RPE morphology was evaluated and graded based on the measurement of the largest hyperreflective protrusions above the RPE line. Foveal microstructural features and best-corrected visual acuity (BCVA) were evaluated 12 months after surgery. RESULTS: At 12 months, a significant correlation was found between postoperative degree of integrity of the photoreceptors with preoperative RPE morphology, and base diameter of the hole (p = 0.003 and p = 0.028, respectively); mean BCVA at 12 months in eyes with diffuse RPE alteration was significantly lower than in eyes with small or no RPE alteration (p < 0.05). CONCLUSIONS: Preoperative RPE integrity may be indicative of good photoreceptor restoration and visual recovery in patients with surgically closed MHs.
Assuntos
Fóvea Central/ultraestrutura , Perfurações Retinianas/patologia , Epitélio Pigmentado da Retina/patologia , Idoso , Feminino , Seguimentos , Humanos , Masculino , Período Pré-Operatório , Perfurações Retinianas/cirurgia , Estudos Retrospectivos , Tomografia de Coerência Óptica/métodos , Acuidade Visual , VitrectomiaRESUMO
Proliferative vitreoretinopathy (PVR) can occur in eyes with rhegmatogenous retinal detachment (RRD) or after RRD surgery, and it is the most common cause of failure of this surgery, accounting for about 75% of all primary failures. Complex biological pathways induce PVR development, with growth factors and cytokines from the vitreous and from the serum (as a result of the breakdown of the blood-retinal barrier) stimulating RPE and Muller cells transformation and proliferation, and membrane formation and contraction. Identification of pre-operative risk factors, recognition of the early signs of PVR, use of adequate surgical techniques and of pharmacological therapy can reduce the PRV incidence. Steroids can influence the inflammatory and proliferative components of PVR, by reducing the breakdown of the blood-retinal barrier, and the proliferation of Müller cell and of RPE cells. Some new formulation of intravitreal steroids are promising tool for the prevention of the PVR formation in eyes treated by vitreoretinal surgery.