Yesterday's eye test went well as my eyes were rested.
One eye remains the same as a year ago.
The other needs a change of 2.5 degrees in the axis for astigmatism.
An extra 0.25 dioptre of power.
0.75 dipotre of prism correction, whereas last year there was no prism correction.
I asked if the lab works to these standards.
The optometrist said most labs don't.
They say the normal 2 degree tolerance takes care of small changes.
However, the boss of one lab is more flexible.
My optometrist says 'I have a crazy astronomer who consistently sees small differences and wants prescriptions made to accurate corrections'.
So it is possible to get high accuracy lenses, but most labs don't work to these standards.
There are no significant cataracts and the eyes are fine otherwise.
However, the small 'bubble' I see could not be detected.
It is about 0.3mm in size.
He says that he needs a high power microscope to see these problems in the lens, and one was not to hand.
Although this 'bubble' appears right and above centre, it is actually in the opposite direction in the lens of the eye, as the image we see is inverted.
One eye remains the same as a year ago.
The other needs a change of 2.5 degrees in the axis for astigmatism.
An extra 0.25 dioptre of power.
0.75 dipotre of prism correction, whereas last year there was no prism correction.
I asked if the lab works to these standards.
The optometrist said most labs don't.
They say the normal 2 degree tolerance takes care of small changes.
However, the boss of one lab is more flexible.
My optometrist says 'I have a crazy astronomer who consistently sees small differences and wants prescriptions made to accurate corrections'.
So it is possible to get high accuracy lenses, but most labs don't work to these standards.
There are no significant cataracts and the eyes are fine otherwise.
However, the small 'bubble' I see could not be detected.
It is about 0.3mm in size.
He says that he needs a high power microscope to see these problems in the lens, and one was not to hand.
Although this 'bubble' appears right and above centre, it is actually in the opposite direction in the lens of the eye, as the image we see is inverted.