Amblyopia – Lazy vision in one eye

Anterior Segment – Front section of the eye, including the lens

Aqueous Humor – Fluid produced in the eye, occupying the anterior and posterior chambers

Choroid – Middle layer of the eye containing blood vessels

Cones – Nerve cells in the retina responsible for sharp vision and detection of color

Conjunctiva – Thin membrane covering the front of the eye

Cornea – Front transparent part of the eye

Cryotherapy – Freezing treatment to destroy abnormal retina

Embryo – A developing baby up to 12 weeks after conception

Fetus – A developing baby from 12 weeks gestation to birth

Fovea – Center of the macula responsible for the sharpest vision

Gestation – how long the pregnancy has lasted

Glaucoma – Increase pressure in the eye, which is potentially blinding if not lowered

Hyaloid Artery – Artery that supplies blood to the front of the eye during development of the embryo/fetus

Indirect Ophthalmoscope – Instrument used to look through the lens of the eye and into the back of the eye

Intraocular Pressure – The pressure inside the eye

Iris – Colored part of the eye, doughnut shaped

Laser – Powerful beam of light that is used to kill abnormal retina

Lens – Football-shaped structure behind the pupil that bends the incoming light rays and focuses them onto the retina

Lens-Sparing Vitrectomy – Surgical procedure for reattaching the retina, keeping the lens intact

Macula – Part of the retina directly behind the lens, which is responsible for central vision

Myopia – Near-sightedness

Nasal Side – Closest to the nose

Optic Disc - Area where the optic nerve exits at the back of the eye

Peripheral Retina – Part of the retina closest to the front of the eye

Pupil – The hole in the iris that lets light into the eye

Retina – Inner light-sensitive layer of the eye

Retinal Detachment – Part or all of the light-sensitive retina comes away from the wall of the eye

Rods - Nerve cells in the retina that detect general outlines of objects and are responsible for colorless vision and night vision

Rush Disease – An aggressive form of retinopathy of prematurity that progresses rapidly

Sclera – Outer layer of the eye, the “white of the eye”

Scleral Buckle - A “belt” that goes around the eye to prevent or treat small areas of retinal detachment

Strabismus – Crossed eyes

Temporal – Closest to the temples, or the side of the head

Uterus – Womb

Vitrectomy - Surgical procedure for reattaching the retina

Vitreous Humor – Gelatinous material that fills the cavity in the back of the eye and gives the eye shape