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• W2912582369 abstract "We provide an answer to the question of Liazos et al. about the hyperfluorescent lines superior and parallel to retinal vessels in our study. They pointed out that if there is slight parallax between these single images, the mean image may show a shadowing of the retinal vessels in surgery-naïve eyes (their Figure 1), because a series of several single images is recorded and a number of these images are averaged to obtain the final fundus image. However, in our study,1Shiragami C. Shiraga F. Yamaji H. et al.Unintentional displacement of the retina after standard vitrectomy for rhegmatogenous retinal detachment.Ophthalmology. 2010; 117: 86-92Abstract Full Text Full Text PDF PubMed Scopus (98) Google Scholar fundus autofluorescence (FAF) imaging was recorded using the Topcon TRC-50DX fundus camera (Topcon, Tokyo, Japan) which does not employ the averaging function to assess or combine several pictures. Therefore, we do not believe there is an artifact. In addition, although the shadowing of the retinal vessel line showed hypofluorescence in their Figure 1, our FAF images showed hyperfluorescent lines parallel to retinal vessels. This hyperfluorescence on FAF images we interpret showing increased metabolic activity of the retinal pigment epithelium. For a long time, the RPE cells beneath the retinal vessels were shielded from light irradiation, and perhaps they maintained dark adaptation because they were shaded by the retinal vessels. After translocation and acute exposure to light, there may be induced increased FAF signals. Also, in the present study, 1 to 5 degrees of extorsion were seen in 16 (all affected eyes) of the 27 eyes (59.3%) and 1 to 4 degrees of vertical deviation (affected eyes/unaffected eyes) were seen in 13 of 27 eyes (48.1%), which had unintentional displacement (slippage) of the retina after surgery for rhegmatogenous retinal detachment (RRD). This provides evidence that the retina moves downwards in the affected eyes after vitreous surgery for RRD. Liazos et al. recommend that we substantiate our findings by using another imaging tool or software (e.g., i-warp) to compare preoperative and postoperative images of eyes that undergo vitrectomy to get an accurate idea of the presence of retinal rotation or displacement. Although we would like to use the software, it is difficult to obtain FAF images of preoperative eyes, because of existence of cystic RRD, vitreous opacity and cataract. It is clear that, in eyes with cystic RRD treated with standard vitrectomy and gas injection, the retina may move downward after the surgery. After complete re-attachment of the retina, FAF demonstrated hyperfluorescent lines superior and parallel to the retinal vessels which may be explained perhaps by increased metabolic activity of the retinal pigment epithelium. Unintentional Retinal DisplacementOphthalmologyVol. 118Issue 3PreviewWe read with interest the article by Shiragami et al1 on unintentional displacement of the retina after standard vitrectomy for rhegmatogenous retinal detachment. Full-Text PDF" @default.
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• W2912582369 doi "https://doi.org/10.1016/j.ophtha.2010.10.018" @default.
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