Chorio-retinal thickness measurements in patients with acromegaly
| Autor: | Fulya Akin, Ramazan Yagci, Mehmet Can Hiraali, Semra Acer, M S Ertürk, Gökhan Pekel, Ebru Nevin Çetin |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
choroidal thickness
Male retina genetic structures visual acuity Glaucoma Neuro-ophthalmology chemistry.chemical_compound sleep disordered breathing Foveal cardiovascular disease middle aged Prospective Studies Prospective cohort study comparative study clinical article medicine.diagnostic_test organ size Diabetic retinopathy Organ Size Anatomy Middle Aged Acromegaly/*complications Adult Choroid/*pathology Cross-Sectional Studies Female Humans Retina/*pathology Tomography Optical Coherence foveal thickness peripapillary retinal nerve fibre layer thickness medicine.anatomical_structure female spectral domain optical coherence tomography visual system parameters eye examination prospective study medicine.medical_specialty optical coherence tomography device extraocular muscle complication subfoveal choroidal thickness Retina Article Ophthalmic pathology Optical coherence tomography Ophthalmology Correspondence Acromegaly medicine cross-sectional study In patient controlled study human optical coherence tomography business.industry Choroid Retinal medicine.disease eye diseases chemistry choroid tumor Clinical Study pathology sense organs business |
| Popis: | Sir, We read with interest the article by Pekel et al1 comparing choroidal, foveal, and peripapillary retinal thickness between acromegaly patients and healthy adults. The authors reported that the mean subfoveal choroidal thickness (SFCT) was higher in acromegaly patients (374.4 vs 308.6 μm in the study and control groups, respectively). It would be interesting, however, to know whether this thickening occurs to the same extent throughout the macula, or if certain regions are more severely affected. There is a potential limitation in measuring choroidal thickness at a single point subfoveally because point thickness measurements can be influenced by local changes in choroidal thickness or irregularities in the choroid–scleral border. The choroid is a complex three-dimensional structure with a highly anastomosed network of blood vessels. Significant topographic variations of choroidal and retinal thicknesses at the macula have been reported.2, 3 Some regions of the choroid may be more sensitive to endocrinological changes in acromegaly. It may thus be useful to measure choroidal thickness at different regions of the macula, for example, at different distances from the fovea both vertically and horizontally, or by assessing mean choroidal thicknesses of pre-defined sectors using the Early Treatment Diabetic Retinopathy Study grid. We are curious to know if the time of the optical coherence tomography scans were standardized, or if they occurred at different times of the day. Earlier studies have demonstrated significant diurnal variation of SFCT measured using spectral-domain optical coherence tomography.4 As the amplitude (difference between the maximum and minimum choroidal thickness) has been reported to be as high as 67 μm, and this amplitude is greater among patients with thicker choroids,4 the observed difference in SFCT between diseased and normal eyes in this study (mean 65.8 μm) could partly be accounted for by diurnal variation. In summary, we congratulate the authors on their interesting findings and look forward to further studies examining the ocular effects of acromegaly at various regions of the macula. It is increasingly evident that the choroid has important roles in normal physiology and in ocular diseases, the study of which will be greatly facilitated by the new swept-source optical coherence tomography devices.5 |
| Databáze: | OpenAIRE |
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