ganglion cells are nerve cells that carry visual signals from the retina to the brain. In eye care, the term usually refers to retinal ganglion cells. They are commonly discussed in glaucoma, optic nerve disease, and vision testing. Clinicians often assess ganglion cells with imaging and functional tests.

bipolar cells are nerve cells in the retina that relay visual signals. They sit between photoreceptors (rods and cones) and ganglion cells (the optic nerve output). They help transform light-driven signals into the patterns the brain can interpret as vision. In eye care, they are most commonly discussed in retinal disease, electroretinography testing, and vision science.

cones are specialized light-sensing cells in the retina. They support sharp central vision, color perception, and vision in brighter light. cones are most concentrated in the macula, especially the fovea. They are commonly discussed in eye exams, retinal disease evaluation, and vision science.

rods are specialized light-sensing nerve cells (photoreceptors) in the retina. They support vision in dim light and help with motion detection and peripheral vision. rods are commonly discussed when explaining night vision, dark adaptation, and certain retinal diseases. Clinicians also refer to rods when interpreting retinal imaging and functional vision tests.

photoreceptors are specialized light-sensing cells in the retina at the back of the eye. They convert light into signals the brain can interpret as vision. They are commonly discussed in eye exams, retinal imaging, and tests of night vision and color vision. They are also central to understanding many inherited and age-related retinal diseases.

Bruch membrane is a thin, layered tissue inside the back of the eye. It sits between the retinal pigment epithelium (RPE) and the choroid (the eye’s vascular layer). It helps support the retina and acts as a regulated “exchange surface” for nutrients and waste. In eye care, it is commonly discussed when interpreting retinal imaging and conditions like age-related macular degeneration.

The retinal pigment epithelium (RPE) is a thin, pigmented layer of cells at the back of the eye. It sits between the light-sensing retina and a blood-rich layer called the choroid. It supports retinal health by feeding, protecting, and maintaining the photoreceptors that enable vision. It is commonly discussed in eye exams, retinal imaging reports, and conditions such as age-related macular degeneration.

perifovea is a specific region of the retina near the center of vision. It forms a ring-like zone around the fovea, within the macula. Clinicians use the term to describe where certain retinal findings are located. It is commonly referenced in retinal imaging (such as OCT) and in disease descriptions.

parafovea is a small ring-shaped region of the retina that surrounds the fovea, the area responsible for the sharpest central vision. It sits within the macula, the central part of the retina used for detailed tasks like reading and recognizing faces. Clinicians use the term parafovea when describing retinal anatomy, test results, and imaging findings around the very center of vision. It is commonly referenced in exams and imaging for macular disease, glaucoma-related central changes, and medication monitoring.

The **foveola** is the tiny central depression at the very center of the macula in the retina. It is the part of the eye most associated with **sharp, detailed central vision**. Clinicians use the term foveola when describing retinal anatomy, eye imaging, and macular disease. It is commonly referenced in ophthalmology exams, OCT scans, and surgical planning discussions.

The fovea is a small central area of the retina responsible for sharp, detailed vision. It is the point your eyes use for reading, recognizing faces, and focusing on fine detail. In clinical care, the fovea is a key landmark for eye exams, imaging, and diagnosis. It is commonly referenced in ophthalmology, optometry, and vision science.

The macula is a small, specialized area near the center of the retina at the back of the eye. It is responsible for detailed central vision used for reading, recognizing faces, and seeing fine detail. The term macula is commonly used in eye exams, retinal imaging, and diagnoses such as macular degeneration. Clinicians also use it to describe where certain retinal diseases or treatments are located.

The retina is a thin, light-sensitive layer of nerve tissue lining the inside back wall of the eye. It converts light into electrical signals that the brain interprets as vision. Clinically, retina is used to describe both the structure itself and the focus of exams, imaging, and treatments aimed at retinal disease. It is commonly discussed in eye care visits when evaluating vision changes, diabetes-related eye findings, and age-related vision problems.

The posterior hyaloid is the back surface layer of the vitreous gel inside the eye. It lies next to the retina and forms an important interface where traction can occur. Clinicians describe it when evaluating floaters, retinal disease, and vitreoretinal traction. It is commonly referenced in OCT imaging, ultrasound exams, and vitrectomy surgery.

hyaloid is an ophthalmology term that refers to structures related to the vitreous body, the clear gel that fills the center of the eye. It most commonly describes the thin surface layer of the vitreous (the anterior or posterior hyaloid) and certain fetal blood vessel remnants (the hyaloid artery system). Clinicians use hyaloid language when describing vitreous anatomy, retinal exams, imaging findings, and vitreoretinal surgery. It is a descriptive term rather than a medication or a standalone treatment.

vitreous humor is the clear, gel-like substance that fills the large space inside the eye behind the lens. It helps the eye keep its shape and provides a transparent path for light to reach the retina. Clinicians discuss vitreous humor when evaluating floaters, flashes, bleeding inside the eye, and retinal conditions. It is also central to several common retinal tests and surgeries.

The vitreous is the clear, gel-like substance that fills most of the inside of the eye. It sits behind the lens and in front of the retina, helping maintain the eye’s shape. Clinicians discuss the vitreous when evaluating floaters, flashes, bleeding, inflammation, or retinal disease. It is also a key space used during certain eye procedures, including vitrectomy and intravitreal injections.

angle recess is the deepest part of the eye’s anterior chamber angle, where the cornea and iris meet internally. It is an anatomic landmark doctors look at when evaluating the eye’s fluid drainage pathway. It is most commonly discussed during gonioscopy and glaucoma-related examinations. It can also be referenced when describing changes after eye trauma or certain eye diseases.

The iridocorneal angle is the internal angle where the iris meets the cornea at the front of the eye. It contains the eye’s main drainage structures for the fluid inside the eye (aqueous humor). Clinicians look at this area to understand eye pressure risk and certain types of glaucoma. It is commonly assessed during eye exams using gonioscopy or anterior-segment imaging.

collector channels are tiny drainage pathways in the eye. They help move clear fluid (aqueous humor) out of the front of the eye. They are part of the natural “outflow” system that helps regulate eye pressure. They are commonly discussed in glaucoma evaluation and glaucoma-related surgery.