|
|
LETTER TO THE EDITOR |
|
Year : 2019 | Volume
: 67
| Issue : 1 | Page : 177-178 |
|
Response to comment on: Optical coherence tomography angiography in acute unilateral nonarteritic anterior ischemic optic neuropathy: A comparison with the fellow eye and with eyes with papilledema
Uppal Gandhi1, Jay Chhablani2, Preeti P Chhablani1
1 Neuro-Ophthalmology Services, L. V. Prasad Eye Institute, Kallam Anji Reddy Campus, L.V. Prasad Marg, Banjara Hills, Hyderabad, Telangana, India 2 Smt. Kanuri Santhamma Centre for Vitreo Retinal Diseases, L. V. Prasad Eye Institute, Kallam Anji Reddy Campus, L.V. Prasad Marg, Banjara Hills, Hyderabad, Telangana, India
Date of Web Publication | 21-Dec-2018 |
Correspondence Address: Dr. Preeti P Chhablani Neuro-Ophthalmology Service, L V Prasad Eye Institute, Kallam Anji Reddy Campus, Hyderabad - 500 034 India
Source of Support: None, Conflict of Interest: None | Check |
DOI: 10.4103/ijo.IJO_1771_18
How to cite this article: Gandhi U, Chhablani J, Chhablani PP. Response to comment on: Optical coherence tomography angiography in acute unilateral nonarteritic anterior ischemic optic neuropathy: A comparison with the fellow eye and with eyes with papilledema. Indian J Ophthalmol 2019;67:177-8 |
How to cite this URL: Gandhi U, Chhablani J, Chhablani PP. Response to comment on: Optical coherence tomography angiography in acute unilateral nonarteritic anterior ischemic optic neuropathy: A comparison with the fellow eye and with eyes with papilledema. Indian J Ophthalmol [serial online] 2019 [cited 2024 Mar 19];67:177-8. Available from: https://journals.lww.com/ijo/pages/default.aspx/text.asp?2019/67/1/177/248136 |
Sir,
We thank Dr. Hayreh for his comments[1] on our study[2] and fully appreciate his volume of work and expertise on this subject.
Regarding some of the points raised – we agree that fundus fluorescein angiography (FFA) findings in non-arteritic anterior ischemic optic neuropathy (NAION) have been extensively reported and would like to explain that this study was not designed to compare optical coherence tomography angiography (OCT-A) with FFA or any other modality. It was aimed at trying to analyze the results of OCT-A in NAION, since it is a relatively new modality and a little is known about its utility in this disorder. Hence, we wish to clarify that we do not propose any new hypothesis regarding the pathophsiology of NAION based on this study, it would be very premature to do so since the technology and our understanding of OCT-A is still evolving. We do not claim to be the first to describe these findings and there are other studies which have tried to use OCT-A to delve deeper into the pathology of this disease[3],[4],[5] and we have cited them in the original article as well.
Visual fields are routinely tested using the Humphrey perimeter in everyday clinical practice and most studies on NAION[6] use this investigative modality. While we realize the inherent limitations of automated perimetry, we have described our visual field testing results based on the investigative modality available to us for routine use.
The terminology used to describe the vascular beds has been used in reference with the OCT-A and has been described in the methodology.
Again, we thank Dr. Hayreh for his interest in our article.
Financial support and sponsorship
Nil.
Conflicts of interest
There are no conflicts of interest.
References | | |
1. | Hayreh SS. Comment on: Optical coherence tomography angiography in acute unilateral nonarteritic anterior ischemic optic neuropathy: A comparison with the fellow eye and with eyes with papilledema. Indian J Ophthalmol 2019;67:176-7. [Full text] |
2. | Gandhi U, Chhablani J, Badakere A, Kekunnaya R, Rasheed MA, Goud A, et al. Optical coherence tomography angiography in acute unilateral nonarteritic anterior ischemic optic neuropathy: A comparison with the fellow eye and with eyes with papilledema. Indian J Ophthalmol 2018;66:1144-8. [ PUBMED] [Full text] |
3. | Sharma S, Ang M, Najjar RP, Sng C, Cheung CY, Rukmini AV, et al. Optical coherence tomography angiography in acute non-arteritic anterior ischaemic optic neuropathy. Br J Ophthalmol 2017;101:1045-51. |
4. | Wright Mayes E, Cole ED, Dang S, Novais EA, Vuong L, Mendoza-Santiesteban C, et al. Optical coherence tomography angiography in nonarteritic anterior ischemic optic neuropathy. J Neuroophthalmol 2017;37:358-64. |
5. | Hata M, Oishi A, Muraoka Y, Miyamoto K, Kawai K, Yokota S, et al. Structural and functional analyses in nonarteritic anterior ischemic optic neuropathy: Optical coherence tomography angiography study. J Neuroophthalmol 2017;37:140-8. |
6. | Scherer RW, Feldon SE, Levin L, Langenberg P, Katz J, Keyl PM, et al. Ischemic Optic Neuropathy Decompression Trial Research Group. Visual fields at follow-up in the ischemic optic neuropathy decompression trial: Evaluation of change in pattern defect and severity over time. Ophthalmology 2008;115:1809-17. |
|