What is restrictive lung disease Restrictive lung disease is a group of conditions characterized by reduced lung volume, either because of an intrinsic cause, such

What is retinal artery occlusion Retinal artery occlusion is a blockage in one of the small retinal arteries that carry blood and oxygen to the nerve

What is retinal vein occlusion Retinal vein occlusion is a blockage of the small veins that carry blood away from the retina. The retina is

What is vitreous hemorrhage Vitreous hemorrhage is defined as the presence of blood within the vitreous cavity, which is the space lined posteriorly by the

What is macular hole A macular hole is a small break in the macula, located in the center of your eye’s light-sensitive tissue called the fovea

What is cyanosis Cyanosis is a condition in which your lips, fingers, toes and mucous membrane appear blue, purple or grey caused by too little

What is nasopharynx Nasopharynx is a small, box-like chamber above the soft palate that connects the nose to the oropharynx. The nose via the nasopharynx

What is optic atrophy Optic atrophy also called optic nerve atrophy, refers to the death of the retinal ganglion cell axons that comprise the optic

What is enophthalmos Enophthalmos is the sinking of the eyeball towards the back part of the eye socket. Enophthalmos becomes clinically obvious if the anterior globe

What is retinoschisis Retinoschisis is splitting into two layers of the neurosensory retina, the tissue lining the inside of the back of the eye that