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The Eye 7:7
Essentials of Healthcare Chapter 7:7
| Term | Definition |
|---|---|
| Amblyopia | lazy eye. Occurs in early childhood. It results in poor vision in one eye and is caused by the dominance of the other eye. |
| Astigmatism | Abnormal shape or curvature of the cornea that causes blurred vision. |
| Cataract | Occurs when the normally clear lens becomes cloudy or opaque. |
| Conjunctivitis | Pink eye, a contagious inflammation of the conjunctiva and is usually caused by a bacterium or virus. |
| Glaucoma | Condition of increased intraocular pressure caused by an excess amount of aqueous humor. |
| Hyperopia | Farsightedness. Occurs when the light rays are not refracted sharply enough and the image focuses behind the retina. |
| Macular Degeneration | Major cause of vision loss and blindness, a disease of the macula, the central and most sensitive section of the retina. |
| Myopia | Nearsightedness. Occurs when the light rays are refracted too sharply and the image focuses in front of the retina. |
| Presbyopia | Farsightedness caused by a loss of lens elasticity. |
| Strabismus | The eyes do not move or focus together. |
| Night blindness | Condition that makes it difficult so see at nigh. The rod cells in the retina are affected. |
| Color blindness | The inability to distinguish colors. |
| Diplopia | Blurred vision. |
| Optometrists | A person who practice optometry. |
| Opticians | A person who gives you glasses. |
| Opthamologist | A specialist with the study and treatment with disorders of the eye. |
| Which area in the brain is responsible for vision? | Opcipital |
| Which area of the brain is responsible for conducting impulses for certain eye reflexes? | Midbrain |
| The eye is well protected by what bony socket of the skull? | Orbital |
| What helps keep out dirt and pathogens? | Eyelids and eyelashes |
| What is the purpose of the lacrimal glands? Where are they located? | Produce tears; in the eyelids |
| Where is the lacrimal duct located and where does it drain? | Corners of the eye and in the nasal. |
| What is the Conjunctiva? | Covers the eye; produce mucus; lubricate the eye. |
| What are the 3 main layers of the eye? | Sclara, Cornea, Choroid coat, Retina |
| What is the purpose of the Sclara? | Maintain eye shape. |
| What is the purpose of the Cornea? | Allows rays to enter the eye. |
| What is the purpose of the Choroid coat? | Blood vessels nourish the eye. |
| What is the purpose of the Retina? | Transmit impulses to optic nerve. |
| What is attached to the outside of the sclera that is responsible for moving the eye within the socket? | Extrinsic Muscle |
| What is the transparent circular part of the front of the eye and its purpose? | Cornea; controls the entrance of light. |
| What is the difference between cones and rods? | Cone- color vision Rods- dark Dem light |
| What is the colored portion of the eye? | Iris; locate behind the cornea |
| What is the opening in the center of the iris? | Pupil |
| What is the circular structure located behind the pupil? | Lens |
| What is the aqueous humor? | clear watery fluid that fills the space between the cornea and iris. |
| What is the vitreous humor? | clear gel |
Created by:
briianna
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