Choroidal haller's and sattler's layers thickness in normal Indian eyes

Abstract

AIM:This study aims to study normative choroidal thickness (CT) and Haller's and Sattler's layers thickness in normal Indian eyes.MATERIALS AND METHODS:The choroidal imaging of 73 eyes of 43 healthy Indian individuals was done using enhanced depth imaging feature of spectralis optical coherence tomography. Rraster scan protocol centered at fovea was used for imaging separately by two observers. CT was defined as the length of the perpendicular line drown from the outer border of hypereflective RPE-Bruch's complex to inner margin of choroidoscleral junction. Choroidal vessel layer thickness was measured after defining a largest choroidal vessel lumen within 750 μ on either side of the subfoveal CT vector. A perpendicular line was drawn to the innermost border of this lumen, and the distance between the perpendicular line and innermost border of choroidoscleral junction gave large choroidal vessel layer thickness (LCVLT, Haller's layer). Medium choroidal vessel layer thickness (MCVLT, Sattler's layer) was measured as the distance between same perpendicular line and outer border of hypereflective RPE-Bruch's complex.RESULTS:The mean age of individuals was 28.23 ± 15.29 years (range 14–59 years). Overall, the mean subfoveal CT was 331.6 ± 63.9 μ. Mean LCVLT was 227.08 ± 51.24 μ and the mean MCVLT was 95.65 ± 23.62 μ. CT was maximum subfoveally with gradual reduction in the thickness as the distance from the fovea increased.CONCLUSION:This is the first study describing the choroidal sublayer thickness, i.e., Haller's and Sattler's layer thickness along with CT in healthy Indian population.

Clinical feature of cystoid macular degeneration in central serous chorioretinopathy

“…[ 14 ] Normal SFCT is variable from 331 to 363 µm, depending upon various factors including ethnicity, refractive error, and duration of the day. [ 15 16 ] Mean SFCT in eyes with CMD in the present series was 396.71 ± 90.5 µm, which was higher than the normal range. It may mean that pachychoroid was a prevalent feature of choroid in eyes with CMD.…”

Morphological and Morphometric Analysis of Canine Choroidal Layers Using Spectral Domain Optical Coherence Tomography

“…The outer boundary of the LVLS is defined as the choroidal scleral interface on the SD-OCT images. The major criteria to differentiate between the MSVL and LVLS layers are the choroidal vessel lumen and the density of the inter-vascular tissue [ 21 ]. We used the method suggested by Branchini et al to establish the outer borders of the choroid and choroid-sclera junction, which was described as a hyperreflective line and was localised externally to the large choroidal vessels [ 34 ].…”

“…A correlation between choroidal dimensions and patient characteristics, such as age, refractive error, corneal refractive power, ethnicity, body height, and sexual maturation, has been observed in numerous studies involving healthy human subjects [ 17 , 18 , 19 , 20 ]. Many studies have investigated choroidal profiles in humans [ 21 , 22 , 23 ]. The morphological features of the choroid in both physiological and pathological conditions indicate that this vascular structure plays a crucial role in many chorioretinal disorders [ 24 ].…”

Treatment outcomes of pachychoroid neovasculopathy with photodynamic therapy and anti-vascular endothelial growth factor

“…It ranges from 260 to 290 microns. [45] Diseases included in the pachychoroid spectrum are uncomplicated pachychoroid (UCP), pachychoroid pigment epitheliopathy (PPE), central serous chorioretinopathy (CSCR), pachychoroid neovasculopathy (PNV) and polypoidal choroidal vasculopathy. PNV refers to the occurrence of Type 1 (subRPE) neovascularization in eyes with thick choroid which were previously normal, had PPE or CSCR.…”