👉 Tetrophthalmus, also known as a tetrogonic eye, is a type of eyelid that is typically found on the front part of the face and has two layers of cells arranged in an "L" shape. The two layers are separated by a membrane called the choroid. Tetrophthalmus is often associated with age-related macular degeneration (AMD), which affects the retina, leading to vision problems like blurred or double vision.
