Eyes may reveal hidden clues about endometriosis

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Participants with a previous surgical or imaging diagnosis of endometriosis * Pre-menopausal women and those assigned female at birth * Aged 18 years and over * A past surgical or imaging diagnosis of endometriosis within the last 5 years from date of consent * Ability to understand and willingness to sign the informed consent form 2. Healthy volunteers * Women and those assigned female at birth * Aged 18 years and over * No history of endometriosis or chronic pelvic pain * Ability to understand and willingness to sign the informed consent form Exclusion Criteria: 1. Participants with a previous surgical or imaging diagnosis of endometriosis * The subject has donated blood (450 ml) within the last 4 weeks * Known reproductive tract malignancy * Ocular Diseases: * Subjects with clinically diagnosed glaucoma, optic neuropathy, optic neuritis, cataracts, or other conditions that affect the ocular structures. * Subjects with age-related macular degeneration, retinal vascular diseases, or other retinal disorders. * Subjects with any other ocular conditions that may influence the retinal or optic nerve structure. * Refractive Errors: * Subjects with high myopia (\>6 diopters) or high hyperopia (\>3 diopters). * Subjects with significant astigmatism (\>2 dioptres) or other refractive errors. * Ocular Surgery History: Subjects with a history of ocular surgery, particularly involving the lens, cornea, retina, or optic nerve (e.g., laser vision correction, retinal surgeries, etc.). * Subjects with significant ocular trauma, corneal abnormalities, or active ocular infections that may interfere with OCT imaging. * Subjects with diabetes mellitus 2. Healthy volunteers * The subject has donated blood (450 ml) within the last 4 weeks * Known reproductive tract malignancy * A history of symptoms suggestive of endometriosis or chronic pelvic pain * Ocular Diseases: * Subjects with clinically diagnosed glaucoma, optic neuropathy, optic neuritis, cataracts, or other conditions that affect the ocular structures. * Subjects with age-related macular degeneration, retinal vascular diseases, or other retinal disorders. * Subjects with any other ocular conditions that may influence the retinal or optic nerve structure. * Refractive Errors: * Subjects with high myopia (\>-6 dioptres) or high hyperopia (\>+6 dioptres). * Subjects with significant astigmatism (\>2 dioptres) or other refractive errors. * Ocular Surgery History: Subjects with a history of ocular surgery, particularly involving the lens, cornea, retina, or optic nerve (e.g., laser vision correction, retinal surgeries, etc.). * Subjects with significant ocular trauma, corneal abnormalities, or active ocular infections that may interfere with OCT imaging. * Subjects with diabetes mellitus