The reason for putting prism in spectacles is to reduce diplopia (double vision) in people who have strabismus (a muscle imbalance that prevents them from maintaining fixation on an object). In cases where the muscle imbalance is mild, the problem can sometimes be overcome by "training" the muscles that are weak by performing exercises as prescribed by an Ophthalmologist. These are sometimes referred to as "pencil push-ups". For example, if a patient has an exotropia (the eyes turn outwards or away from the nose, the ophthalmologist will get the patient to fixate on a pencil while having them move it closer then farther away from their nose in a repetitive fashion. This forces the eyes to go "cross-eyed" and strengthens the medial muscles.
The same person as if they were not wearing spectacles. Spectacles are worn to correct vision disorders.
what is the person wearing if he has on spectacles.?
I can't find my spectacles!
what is the person wearing if he has on spectacles.?
what is the person wearing if he has on spectacles.?
There is no specific collective noun for 'spectacles' (or 'eyeglasses), most likely because spectacles aren't normally found in groups. However, if there is a group of spectacles, any noun suitable for the situation can function as a collective noun; for example a box of spectacles, a pile of spectacles, a row of spectacles, etc.
Yes, bloody spectacles or blood sports were held in the Colosseum.Yes, bloody spectacles or blood sports were held in the Colosseum.Yes, bloody spectacles or blood sports were held in the Colosseum.Yes, bloody spectacles or blood sports were held in the Colosseum.Yes, bloody spectacles or blood sports were held in the Colosseum.Yes, bloody spectacles or blood sports were held in the Colosseum.Yes, bloody spectacles or blood sports were held in the Colosseum.Yes, bloody spectacles or blood sports were held in the Colosseum.Yes, bloody spectacles or blood sports were held in the Colosseum.
There is no specific collective noun for spectacles. Use the collective noun appropriate for the situation; for example a display of spectacles (in a shop), a collection of spectacles (in a drawer), a spectrum of spectacles (in an alliteration or a poem), etc.
The Black Spectacles was created in 1939.
Spectacles is an older word for eyeglasses. If spectacles were opaque, no one could see through the lenses. The glass (now plastic) used in spectacles must be clear and without scratches.
Angled glasses http://www.dynamic-living.com/product/angled-glasses-bed-spectacles/#name_photoBox Prism glasses http://www.easierliving.com/ProductDetail.asp?style=8451W&source=yahoo&adgroup=prismglasses&adtext=Alimed http://www.activeforever.com/p-331-prism-glasses.aspx Bed Spec http://www.selsioptics.com/glasses.htm
'spectacles' (same spelling as English) or 'lunettes'