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Doctor insights on: Pupillary Athetosis

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What is meant by pupillary distance ?

What is meant by  pupillary distance ?

Space between eyes: This is a number needed by eyeglass makers to properly space the optical centers on eyeglasses and it is the exact distance between the centers of the two pupils when the eyes fixate at a distance. It is needed on a prescription from an optical shop (termed P.D.) and you would need it if you order eyeglasses online. ...Read more

Dr. Mark Pack
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Athetosis (Definition)

Atheros's is a symptom in which a person has a slow, writhing, involuntary, wormlike movements of the limbs, especially in the hands and fingers. Atheros's is a movement disorder that can be from a ...Read more


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Recent pupillary distance was measured as 65; before it was always 63, as adult. Does this reflect an underlying health issue?

Recent pupillary distance was measured as 65; before it was always 63, as adult. Does this reflect an underlying health issue?

Not to worry: Pupillary distance measurements are not very accurate, so it is unlikely that you have a problem. In the rare instance where you might have a cyst in the sinus or a tumor behind the eye, you would see an eye bulging or would have double vision. ...Read more

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What is afferent pupillary defect?

What is afferent pupillary defect?

Marcus-Gunn pupil: An afferent pupillary defect indicates a lesion in the afferent limb (retina or optic nerve) of the pupillary reflex. Such a lesion is best appreciated on the "swinging flashlight test." a lesion in the left optic nerve will decrease the perceived illumination in that eye, and when the flashlight is swung from the right to the left eye, the left pupil will appear to dilate slightly. ...Read more

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Can pupillary reaction present in blind people?

Can pupillary reaction present in blind people?

Usually: Except in the most severe cases, there is a pupillary reaction in blind eyes. ...Read more

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Is pupillary reaction present in blind people? Please, need some answers?

Is pupillary reaction present in blind people? Please, need some answers?

Depends : If all the visual fibers in one eye are lost, then the pupil will react depending upon the light shining upon the other eye (due to interconnected reflexes) (termed amaurotic pupil). Some can lose all vision and retain the pupillary fibers so the eye will react to light. If the eye is lowered in vision (legally blind) it can still react to light. Also some blindness is from trauma; fixed pupils ...Read more

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What are the methods for obtaining pupillary distance for glasses? Which is best for me?

What are the methods for obtaining pupillary distance for glasses? Which is best for me?

Optometrist: You can get this done at any eyeglass shop, an optometrist office, or at your eye doctor, the ophthalmologist's office, its a simple measurement that does not require any extremely fancy device ...Read more

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Do I need to have a different pupillary distance value for the single vision (SV) reading, SV computer and SV reading? How determined for all three?

Do I need to have a different pupillary distance value for the single vision (SV) reading, SV computer and SV reading? How determined for all three?

Usually same SV: Usually same PD for all distances. An optician, OD or eyeMD's office can mark it on your glasses and measure it for you. Or consult with us and we can show you how to do in on video conferencing. ...Read more

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Pupils diameter widened permanently. Pupillary rsponse to light absolutely fine. Going through a low phase emotionally. Minor headache sometime. Worry?

Pupils diameter widened permanently. Pupillary rsponse to light absolutely fine. Going through a low phase emotionally. Minor headache sometime. Worry?

People vary: Your pupils could be large, but still be normal. There are tall people and short people, it all follows a bell shaped curve. With all the problems in your side of the world, anyone would feel this. I feel it from around the world. ...Read more

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My ophthalmologist said that I have afferent pupillary defect (apd 5) and hippus, what does this means?

My ophthalmologist said that I have  afferent pupillary defect (apd 5) and hippus, what does this means?

Pupil changes: An afferent defect of the pupil refers to an abnormal dilation instead of constriction when light hits the eye. It is due to major loss of total light input in the affected eye such as massive retinal loss, optic nerve disease, etc. Hippus is a twitchy pupil jerkiness and sometimes is normal but can be seen in response to certain drugs. ...Read more

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Can you tell me how actors control their pupillary response when something such as a flashlight is shone into their eyes?

Can you tell me how actors control their pupillary response when something such as a flashlight is shone into their eyes?

They don't: It is impossible to control the pupils response to light and /or dark,. There are drops that can make the pupils get smaller and that make the pupils get bigger. These can affect the eyes ability to focus. ...Read more