Comparison of chorioretinal layers in rhesus macaques using spectral-domain optical coherence tomography and high-resolution histological sections

Glenn C Yiu, Zhe Wang, Christian Munevar, Eric Tieu, Bradley Shibata, Brittany Wong, David Cunefare, Sina Farsiu, Jeffrey A Roberts, Sara M Thomasy

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Nonhuman primates are important preclinical models of retinal diseases because they uniquely possess a macula similar to humans. Ocular imaging technologies such as spectral-domain optical coherence tomography (SD-OCT) allow noninvasive, in vivo measurements of chorioretinal layers with near-histological resolution. However, the boundaries are based on differences in reflectivity, and detailed correlations with histological tissue layers have not been explored in rhesus macaques, which are widely used for biomedical research. Here, we compare the macular anatomy and thickness measurements of chorioretinal layers in rhesus macaque eyes using SD-OCT and high-resolution histological sections. Images were obtained from methylmethacrylate-embedded histological sections of 6 healthy adult rhesus macaques, and compared with SD-OCT images from 6 age-matched animals. Thicknesses of chorioretinal layers were measured across the central 3 mm macular region using custom semi-automated or manual software segmentation, and compared between the two modalities. We found that histological sections provide better distinction between the ganglion cell layer (GCL) and inner plexiform layer (IPL) than SD-OCT imaging. The first hyperreflective band between the external limiting membrane (ELM) and retinal pigment epithelium (RPE) appears wider on SD-OCT than the junction between photoreceptor inner and outer segments seen on histology. SD-OCT poorly distinguishes Henle nerve fibers from the outer nuclear layer (ONL), while histology correctly identifies these fibers as part of the outer plexiform layer (OPL). Overall, the GCL, inner nuclear layer (INL), and OPL are significantly thicker on histology, especially at the fovea; while the ONL, choriocapillaris (CC), and outer choroid (OC) are thicker on SD-OCT. Our results show that both SD-OCT and high-resolution histological sections allow reliable measurements of chorioretinal layers in rhesus macaques, with distinct advantages for different sublayers. These findings demonstrate the effects of tissue processing on chorioretinal anatomy, and provide normative values for chorioretinal thickness measurements on SD-OCT for future studies of disease models in these nonhuman primates.

Original languageEnglish (US)
Pages (from-to)69-76
Number of pages8
JournalExperimental Eye Research
Volume168
DOIs
StatePublished - Mar 1 2018

Fingerprint

Optical Coherence Tomography
Macaca mulatta
Histology
Ganglia
Primates
Anatomy
Methylmethacrylate
Retinal Diseases
Choroid
Retinal Pigment Epithelium
Nerve Fibers
Biomedical Research
Software
Technology
Membranes

Keywords

  • Histology
  • Optical coherence tomography
  • Primate
  • Retina
  • Rhesus macaque

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Cite this

Comparison of chorioretinal layers in rhesus macaques using spectral-domain optical coherence tomography and high-resolution histological sections. / Yiu, Glenn C; Wang, Zhe; Munevar, Christian; Tieu, Eric; Shibata, Bradley; Wong, Brittany; Cunefare, David; Farsiu, Sina; Roberts, Jeffrey A; Thomasy, Sara M.

In: Experimental Eye Research, Vol. 168, 01.03.2018, p. 69-76.

Research output: Contribution to journalArticle

Yiu, Glenn C ; Wang, Zhe ; Munevar, Christian ; Tieu, Eric ; Shibata, Bradley ; Wong, Brittany ; Cunefare, David ; Farsiu, Sina ; Roberts, Jeffrey A ; Thomasy, Sara M. / Comparison of chorioretinal layers in rhesus macaques using spectral-domain optical coherence tomography and high-resolution histological sections. In: Experimental Eye Research. 2018 ; Vol. 168. pp. 69-76.
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