Normal Peripheral Choroidal Thickness Measured by Widefield Optical Coherence Tomography

Abstract

Purpose: Choroidal stasis plays an important role in the pathogenesis of many conditions and leads to choroidal thickening. However, the normal peripheral choroidal thickness (PCT) pattern remains unknown. This study investigated PCT and associated factors using ultrawidefield optical coherence tomography in healthy eyes.Methods: This cross-sectional study included 120 healthy eyes (57 males; age, 52.0 6 20.5 years). We used choroidal thickness maps created by ultrawidefield optical coherence tomography (viewing angle, 200°) with real-shape correction. The peripheral area was defined from 60°to 100°and further separated vertically and horizontally. The PCT and the correlations between PCT and subjects' characteristics were examined.

Analysis of Widefield Choroidal Thickness Maps of Healthy Eyes using Swept Source Optical Coherence Tomography

“…In the present study, the choroidal thicknesses in all sub elds were negatively associated with advanced age. This nding was similar to the results of previous studies using OCT B-scans [11,12,19,22,23]. Ocular blood ow decreases with advanced age [28], probably because of age-related increases in systemic vascular resistance.…”

“…Mori et al recently examined the choroidal thickness in healthy eyes using macular cross-scanning OCT with a length of 6 mm or 9 mm and showed the associations with age, sex, AL, and the spherical equivalent [12]. Funatsu et al most recently examined the choroidal structure in healthy eyes using 12 long radial scans and reported the WF choroidal thickness features [19]. Their results were fairly consistent with the main results of the present study.…”

Effects of Perfluorocarbon Use during Rhegmatogenous Retinal Detachment Surgery on Postoperative Outcomes

“…The questionnaire about the preoperative clinical characteristics and surgical interventions was developed by the JRVS registry committee members based on previous reports [12,13]. The information collected included the age at time of surgery, sex, interval between diagnosis and surgery, best-corrected visual acuity (BCVA) in logarithm of the minimum angle of resolution (log MAR) units, intraocular pressure (IOP), refractive error, axial length, lens status, type of retinal breaks, number of breaks, location of the largest breaks, size of the largest breaks, extend of detached retina (per a quadrants), macular state, duration of macular detachment, previous ocular intervention, gauge of vitrectomy instruments, surgical time, presence of posterior vitreous detachment, removal of the internal limiting membrane, and intentional breakage of the retina for drainage.…”

“…The Japanese Retina and Vitreous Society (JRVS) has established a vitreoretinal surgery treatment information database which registers information of patients diagnosed and treated for a RD between 2016 and 2017 at specialized vitreoretinal facilities throughout Japan. Several studies have been published using this database with real-world information [12,13]. The purpose of this study was to determine whether the use of PFCL affects the rate of re-attachments after primary vitrectomy for RRD and to determine whether there are adverse effects of PFCL use in the real-world.…”

A new method to solve the problem of troubled measurement of peripheral choroidal thickness

“…While we acknowledge that our method may not be flawless, we propose it as a novel approach to measuring peripheral choroidal thickness. 1,6,7 The observations raised by Mignone et al are valuable, and we are keen to maintain a constructive dialog on these matters. The critical issue of compensating for ocular axial length in measurements warrants ongoing consideration.…”