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
