op-, opt-, optico-, opsi-, opso-, -opia, -ops, -opsia, -opsis, -opsy, -optic, -opic, -opy

1. A positive change of vision in the aging whereby myopia (distant objects are blurred) is corrected to normal vision: Dr. Smith and Dr. Swift were amazed at the senopia of the elderly patient.
2. Improvement in near vision of people past their prime: At the medical school, several students, including Mary and Sam, were interested in doing more research in developing better treatments for the senopias of senior citizens.

The narrow opening of the eyelids.

The ability to perceive depth, or the ability to see three-dimensionally.

The person must be binocular before such actions can take place.

A "magic lantern", especially one with two projectors arranged so as to produce dissolving views.

1. A brief outline or general view; such as, a subject or written work resulting in an abstract or a summary.
2. A sketchy summary of the main points of an argument or a theory.
3. A brief description of the contents of something such as a film or book.
4. Etymology: from Late Latin synopsis, "a synopsis"; from Greek synopsis, "general view"; from a stem of synoran, "to see altogether, to see all at once"; from syn-, "together" + opsis, "to see, to view".

To summarize or to make a brief, condensed summary, outline, or statement of something that is longer.

1. Constituting a synopsis; that is, presenting a summary of the principal parts or a general view of the whole of something.
2. In meteorology, relating to data obtained nearly simultaneously over a large area of the atmosphere.
3. Taking a common view; used chiefly in reference to the first three Gospels, known as the "synoptic Gospels"; specifically, Matthew, Mark, and Luke, from their similarity in their contents, order, and statements.

A reference to making a sketchy summary of the main points of an argument, document, or a theory: "The theory that was presented here is synoptically inaccurate."

1. Defective vision or blindness in one fourth of the visual field.
2. A rare type of dichromatic vision (defective color vision in which one of the three cone pigments is missing) of doubtful existence, characterized by perception of red and green only, with blue and yellow perceived as an achromatic (gray) band.

1. An essay expressing a view on the subject of death.
2. A contemplation of death.
3. An expression of someone’s thoughts about death, e.g. in a poem. See the full version of Thanatopsis.

Another word for autopsy or a surgical procedure, postmortem, which involves the examination of body tissues, often to determine the cause of death; necropsy.

The ability to see three primary colors.

Visual defect in which three images of the same object are seen.

1. A rare condition in which perception of blue and green becomes confused: Tritanopia is a result of the absence of the blue-sensitive pigment in the cone cells of the retina.
2. A visual defect in which the retina fails to respond to the color blue: Due to his tritanopia, Lord Allton, the artist, worked in black and white, avoiding the use of any warm tones in his paintings.
3. Etymology: from Greek tritos, "third" + anopia, "blindness". Based on the idea of not seeing a third of the color spectrum.

Hemianopsia affecting only one eye.