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Choroidal Thickness and Retinal Vein Occlusions [Letter]
Authors Marino AV, Gioia M, Reda L, La Marca A
Received 14 January 2023
Accepted for publication 9 February 2023
Published 4 March 2023 Volume 2023:17 Pages 747—748
DOI https://doi.org/10.2147/OPTH.S404819
Checked for plagiarism Yes
Editor who approved publication: Dr Scott Fraser
Andrea Valerio Marino, Marco Gioia, Ludovica Reda, Aniello La Marca
Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Baronissi, Salerno, Italy
Correspondence: Ludovica Reda, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana” University of Salerno, via S. Allende, Baronissi, Salerno, 84081, Italy, Tel +39 089672407, Email [email protected]
View the original paper by Dr Moleiro and colleagues
A Response to Letter has been published for this article.
Dear editor
We read with great interest the article by Moleiro et al1 concerning peripapillary and subfoveal choroidal thickness (ChT) in case of retinal vein occlusions.
We congratulate the authors because BRVO and CRVO are leading causes of visual loss in the world, especially in the elderly and research on this topic is always interesting.
ChT measurements have been checked in several diseases2,3 but we have some concerns about the reliability of the measurements obtained in this paper. The reason is that, as shown in Figure 1, the foveal depression is not certainly identifiable because of retinal exudates, making the assessment of subfoveal ChT.
In the case of small structures to be precise is very important because a few microns could significantly change the results as ChT varies greatly from the foveal to the perifoveal area.
Even though it is known that the measurements should performed on images obtained in microns scale the authors evaluate ChT on images in pixels scale.
In addition, several papers prove a relationship between ChT and axial length: eyes with a shorter axial length are related to thicker choroid and longer axial lengths to thinner one, but the authors did not consider the possible physiological difference between the axial length of both eyes.
We are aware that axial length measurements are not very precise and some corrections are needed, but they should be precise enough for checking relationships.4
Funding
There is no funding to report.
Disclosure
The authors report no conflicts of interest in this communication.
References
1. Moleiro AF, Godinho G, Madeira C, et al. Peripapillary and subfoveal choroidal thickness in retinal vein occlusions. Clin Ophthalmol. 2022;16:3775–3783. doi:10.2147/OPTH.S379373
2. De Bernardo M, Vitiello L, Battipaglia M, et al. Choroidal structural evaluation in celiac disease. Sci Rep. 2021;11:16398. doi:10.1038/s41598-021-95812-y
3. De Bernardo M, Salerno G, Gioia M, et al. Intraocular pressure and choroidal thickness postural changes in multiple system atrophy and Parkinson’s disease. Sci Rep. 2021;11(1):8936. doi:10.1038/s41598-021-88250-3
4. De Bernardo M, Cione F, Capasso L, Coppola A, Rosa N. A formula to improve the reliability of optical 56 axial length measurement in IOL power calculation. Sci Rep. 2022;12:18845. doi:10.1038/s41598-022-23665-0
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