My attempt on reading these old prescriptions:
Using the example of Age13:
Eyes without correction : 20/60 and 20/50 (On Snellen this corresponds to ~-1.25D)
With -1.25D correction with pinhole glasses: 20/25 both eyes (this is ~-.025D but negligible)
Full 20/20 vision could be achieved with the following test lenses
OD:-1.25SPH -0.75CYL axis 105
OS: -1.37SPH -0.75CYL axis 90
For the rest in general:
Vision without / with / pinhole line:
So they first meaured your vision on Snellen without any corrections.
In my opinion this only makes sense up to about -1.5D above that the chart is just too much outside of your bubble to get anything clear, not matter the letter size. In your case it only made real sense with the first reading, the rest was outside of -1.5D
Measurement with test lenses (I guess SPH only)
Visual acuity when cutting out the out-of-focus rays (see more at the end of the post)
If this doesn’t bring you to 20/20 then you have an issue with the eye.
If this brings you to 20/20 then cyl is the solution.
And then the summary of the measurements:
The last 2 rows, OD / OS shows what corrections you needed for 20/20 vision.
You were always corrected to 20/20.
And then you always have the SPH, the CYL and the axis.
Your main diopter got worse and worse each year, your cyl stayed the same or reduced, and the axis is unchanged (did you have the same room with the same desk and same lights at home for studying?)
You have -1.37 at the age of 13 and -2.87 at the age of 16 => It looks like the test lens could measure eigth of diopters not just quarters.
I wonder if then you got -1.37 and -2.87 in actual glasses or just the quarter near it.
At age 15 they added colour blindness. Are you colour blind? or was it a temporary observation?
Here is how the pinhole glass works.
“A pinhole occluder is an opaque disk with many small holes through it, used to test visual acuity. The occluder is a simple way to focus light, as in a pinhole camera, temporarily removing the effects of refractive errors. Since light passes only through the center of the eye’s lens, defects in the shape of the lens (errors of refraction) have no effect while the occluder is used. In this way we can estimate the maximum improvement in a patient’s vision that can be attained by lenses to correct errors of refraction. This can be used to distinguish visual defects caused by refractive error, which improve when the occluder is used, from other problems, which do not.”
Search brought up this guy with the beard and a video about pinhole glasses