Doctor insights on:
Can You Tell Me What Is Volunteer Double Vision
Out of focus eye: Eyes generally like to develop together and focus together. If one eye is grossly out of focus compared with the other due to extreme farsightnedness or astigmatism, amblyopia may be the result. This can usually be treated with glasses or contacts. Myopic patients are generally less affected since they can see clearly up close with the weaker eye. ...Read moreSee 1 more doctor answer
Diplopia: Seeing two images most commonly occurs when the eyes are out of alignment. This can occur from nerve, muscle or tissue damage from trauma, or vascular accidents. Doubling can occur in one eye from astigmatism, lens opactities and macular disturbances. See your ophthalmologist for the proper diagnosis and treatment. ...Read more
Determines glaucoma: The threshold of vision means the lowest size or intensity of a spot of light that the eye can see. A threshold visual field test is used to detect glaucoma: multiple small spots of light are placed in different areas in a specialized testing device and the patient presses a buzzer if he/she sees them. Glaucoma decreases peripheral vision and threshold testing would show fewer spots seen by you. ...Read moreSee 1 more doctor answer
Brain compensation: The brain is the actual site of vision and it compensates for permanent things in the vision. Both of your eyes have a blind spot, a spot with no light receptors where the nerve exits, which can be mapped out by your ophthalmologist in a test called visual field. Your brain has learned to ignore these holes in the vision and fills them in so you are not aware of them being present. ...Read more
Pucker: You are probably referring to a condensation of the vitreous face over the macula which causes a ripple in the underlying retina and a lowering of the vision. This is not often termed a pleat but could be named so. These need evaluation by retinal specialists who can sometimes treat it. ...Read more
Depends: Most of the brain is dedicated in some way to processing vision. Depending on the part that's affected by a stroke, the vision changes can vary widely. Some people simply lose all or part of their vision. In rare cases, it can be more specific, like loss of motion vision or face recognition. ...Read more
Refractive error: Astigmatism is a measure of how "unround" the eye is. We tend to think that the eye is a perfectly round globe, but it actually is almost always at least a little oblong, like a rugby ball. The degree to which the front window (cornea) is oblong is measured in amount and angle of astigmatism (in which direction the ball is standing). Glaucoma has nothing to do with astigmatism. ...Read moreSee 1 more doctor answer
Not possible: there is no such condition." double jointed" seems like a term that is used for laxity in normal joints. There is a wide range of what is normal. ...Read more
A computer: Use Adobe Photoshop and use specialized filter ...Read more
Complicated: An image is focused by the eye on the retina which translates the light into an electrical signal conveying the shape, color and other features of the image to the occipital lobe of the brain. This part of the brain converts that signal into the picture that we call vision. A book has been written on each step in the sequence as it is very complicated. ...Read more
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