by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Lacrimal sac A little structure that drains away tears. Little channels called canaliculi are present in the inner corner of the eyelids into which tears drain. From there, they are dumped into the lacrimal sac and then drained into the nose and throat. Disorders of...
by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Astigmatism An optical error in which there are two or more abnormal focal point in the eye, unlike hyperopia (farsightedness) or myopia (nearsightedness) where there is just one abnormal focal point that needs correcting. (See Refractive Disorders for more details.)...
by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Lens The structure that sits behind the pupil and which acts to focus light onto the retina just as a camera lens focus light onto the film inside. (See Eye Anatomy and How The Eye Works for more details.) The lens is normally crystal clear, and cannot be seen with...
by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Refraction Part of an eye exam that determines the optical error of the eye. This is often used to measure for the strength of glasses or contacts needed to see well. It is useful in determining if there were any changes in the eye\’s ability to focus as seen in...
by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Macular Degeneration Deterioration of the macular region of the retina resulting in loss of central vision. (See FAQ’s on Macular Degeneration for an extensive discussion.)
by daniel | Nov 16, 2016 | Common Definitions in Eye Care
Blepharitis Infection or inflammation of the rim of the eyelid. Often referred to as “granulated eyelids.” This is frequently due to infection of the oil glands around the lid margin, but can also be associated with dandruff, some forms of acne, and eye...
