Med Term Chapter 16 Sensory System Eye Structures
Vitreous Body-
A transparent jellylike substance filling the interior of the eyeball
Sight
Ability to see.
Trichiasis-
Abnormal growth of eyelashes in a direction that causes them to rub on the eye.
Exophthalmos-
Abnormal protrusion of the eyeballs.
Aphakia-
Absence of a lens.
ARMD-
Age-related Macular Degeneration
Presbyopia-
Age-related diminished ability to focus or accommodate.
Glaucoma-
Any of various diseases caused by abnormally high eye pressure.
Eyestrain-
Asthenopia
Pupil
Black circular center of the eye; opens and closes when the muscles in the iris expand and contract in response to light.
Scotoma-
Blind spot in vision.
Cycl(o)-
Ciliary Body
Cataract-
Cloudiness of the lens of the eye.
Eyebrow
Clump of hair, usually about a half an inch above the eye, that helps to keep foreign particles from entering the eye.
Iris
Colored part of the eye;contains muscles that expand and contract in response to light.
Lens
Colorless, flexible transparent body behind the iris.
Conjunctiv(o)-
Conjunctiva
Corne(o)-
Cornea
Kerat(o)-
Cornea
Keratoplasty-
Corneal Transplant
Contact Lens-
Corrective lenses worn on the surface of the eye.
Fovea centralis
Depression in the center of the macula lutea; perceives sharpest images.
Esotropia-
Deviation of one eye inward.
Exotropia-
Deviation of one eye outward.
DVA-
Distance Visual Acuity
Astigmatism-
Distortion of sight because of lack of focus of light rays at one point on the retina.
Diplopia-
Double Vision.
Blepharoptosis-
Drooping of the eyelid.
OU-
Each Eye
ENT-
Ear,Nose,and Throat
Nystagmus-
Excessive involuntary eyeball movement.
Epiphora
Excessive tearing.
Photophobia-
Extreme sensitivity to light.
Ocul(o)-
Eye
Ophthalm(o)-
Eye
Opt(o)-
Eye
Strabismus-
Eye misalignment.
Pseudophakia-
Eye with an implanted lens after cataract surgery.
EENT-
Eye,Ear,Nose, and Throat
Blephar(o)-
Eyelid
Cryoretinopexy-
Fixing of a torn retina using extreme cold.
Hyperopia-
Focusing behind the retina causing vision distortion; farsightedness.
Myopia-
Focusing in front of the retina causing vision distortion; nearsightedness.
Macular Degeneration-
Gradual loss of vision caused by degeneration of tissue in the macula.
Eyelashes
Group of hairs protruding from the end of the eyelid; helps to keep foreign particles from entering the eye.
Farsightedness-
Hyperopia
iridotomy-
Incision into the iris to relieve pressure.
Hordeolum/sty-
Infection of a sebaceous gland of the eyelid.
Dacryocystitis-
Inflammation of a tear duct.
Conjunctivitis-
Inflammation of the conjunctiva of the eyelid.
Keratitis-
Inflammation of the cornea.
Blepharitis-
Inflammation of the eyelid.
Iritis-
Inflammation of the iris.
Dacryoadenitis-
Inflammation of the lacrimal glands.
Macula
Inner ear structure containing hairlike sensors that move to maintain equilibrium.
IOL-
Intraocular Lens
IOP-
Intraocular Pressure
Blepharospasm-
Involuntary eyelid movement; excessive blinking.
Ir-/Irid-
Iris
OS-
Left Eye
Phac(o)-
Lens
Phak(o)-
Lens
Blepharochalasis-
Loss of elasticity of the eyelid.
Dermatochalasis-
Loss of elasticity of the eyelid.
Blindness-
Loss or absence of vision.
Tonometry-
Measurement of tension or pressure within the eye.
Ophthalmologist-
Medical specialist who diagnoses and treats eye disorders.
Tears
Moisture secreted from the lacrimal glands.
Eyelid
Moveable covering over the eye.
Conjunctiva
Mucous membrane lining the eyelid.
Nearsightedness-
Myopia
NVA-
Near Visual Acuity
Optic Nerve
Nerve that transmits nerve impulses from the eye to the brain.
Nyctalopia-
Night Blindness
Chalazion-
Nodular inflammation that usually forms on the eyelid.
Optometrist-
Nonmedical specialist who examines the eyes and prescribes lenses.
Aqueous Body-
Optically clear liquid that occupies the anterior and posterior chambers of the eye.
Eye
Organ of sight.
Retina
Oval, light-sensitive membrane in the interior layer of the eye; decodes light waves and transmits information to the brain.
Refraction
Process of bending light waves
Cor(o)-
Pupil
Pupill(o)-
Pupil
Uvea
Region of the eye containing the iris, choroid membrane, and ciliary bodies.
Dacryoscystectomy-
Removal of a lacrimal sac.
Enucleation-
Removal of an eyeball.
Iridectomy-
Removal of part of the iris.
Retin(o)-
Retina
AD-
Right Ear
OD-
Right Eye
Lacrimation-
Secretion of tears, usually excessively.
Macula lutea
Small, yellowish area located in the center of the retina, which has a depression called the fovea centralis.
Cones
Specialized receptor cells in the retina that perceive color and bright light.
rods
Specialized receptors cells in the retina that perceive black and white shades.
Blepharoplasty-
Surgical repair of the eyelid.
Dacry(o)-
Tears
Lacrim(o)-
Tears
Optician-
Technician who makes and fits corrective lenses.
Ciliary
Thick anterior membrane in the middle layer of the eye.
Neuroretina
Thick layer of nervous tissue in the retina.
Sclera
Thick, tough membrane in the outer eye layer; supports eyeball structure.
Choroid
Thin posterior membrane in the middle layer of the eye.
Cornea
Transparent anterior section of the eyeball that bends light in a process called refraction.
Diopter-
Unit of refracting power of a lens.
Phacoemulsification-
Use of ultrasound to break up and remove cataracts.
Uve(o)-
Uvea
VA-
Visual Acuity
VF-
Visual Field
Ophthamoscopy-
Visual examination of the interior of the eye.
Asthenopia-
Weakness of the ocular or ciliary muscles that that causes the eyes to tire easily.