Adnexa are accessory structures which are involved in protecting and/or supporting the function of an organ. The eye and peri-ocular tissues are extremely specialised. The eyebrows, eyelids, eyelashes, lacrimal gland and drainage apparatus all play a crucial role with regards to globe protection, lubrication and minimising the risk of ocular infection. These adnexal structures also help create the optimum environment for corneal transparency and therefore clear vision.
