"deterioration of vision" is a correct and usable phrase in written English.
It is used to describe a medical condition in which the sharpness of a person's vision becomes worse over time. For example, you could say: "After years of working in the dark, the miner began to suffer from a deterioration of vision."
But it mainly slows the deterioration of vision rather than improve it.
The only symptom is deterioration of vision due to irregular astigmatism caused by the changing corneal curvature.
The only drug now approved to treat that condition -- Visudyne, developed by QLT Inc. -- generally slows deterioration of vision but does not improve it.
These techniques can give us insights into the tear film, and allow assessment of conditions that can lead to dry eye symptoms, and in severe cases, to significant ocular surface damage and deterioration of vision.
His past ocular history was significant for blunt trauma to the left eye with a stick while riding an all-terrain vehicle 8 months ago; over the following 3 months, the eye became painful with deterioration of vision for which he sought ophthalmic care.
These newer methods may have an important role in limiting deterioration of vision, increasing unaided and uncorrected vision, and reducing the case for corneal transplantation.
One week following the increased cyclosporine dose she presented with a further deterioration of her vision with 6/18 vision in the left eye and non-useful vision in the right eye.
The initial complain of the patient was deterioration of peripheral vision in addition to the already affected central vision.
A functional defect of these cells may therefore lead to a deterioration of color vision as well as to a reduction of dark vision.
"Honestly, I felt like this is my last shot, because the deterioration of my vision for the last year has been so severe that if it continues the way that it has been going, I don't really feel that I would be able to work here actively two years from now to try again," he said.
During the forthcoming Conclave, there will be 115 cardinal-electors: they have to be younger than 80 to be eligible to vote, but Cardinal Julius Riyadi Darmaatmadja, the 78 year-old Archbishop Emeritus of Jakarta, has ruled himself out of travelling to Rome due to the "progressive deterioration" of his vision.
