What do the eyetest prescription numbers mean?

The higher the number, the worse you're eyesight is.What do the eyetest prescription numbers mean?
the strength of the lensWhat do the eyetest prescription numbers mean?
My eyesight is 20/60.20 is good,60 means i am nearsighted.
Example my RX R. +2.00ds -2.25cyl axis 90 6/6 Okay I'll try to explain that. +2.00ds the long sighted component -2.25cyl the astigmatic component. Axis the axis of the cylindrical component 6/6, 20/20 vision. Wish I could do you a diagram. Much easier to explain that way. Optician.
it means how far can you see from a distance and how close your vision can bring the object to your view
It could be the logMAR measurement, some opticians use this rather than the traditional Snellen measurement.





20/20 is the same as 6/6 (we use 6/6 in the UK because we are metric, 20/20 refers to feet- old fashioned!)





Snellen measurements will give you a measurement of your vision in 6/6 terms.





You have not specified what this reading is. A prescription has the strength of glasses you require (even if this figure is zero), that will look like:





+1.00/-0.25x10 (plus means long sighted)


or


-1.00/-0.25x10 (minus means short sighted)





Then you will have a section that says what your visual acuity is. Visual Acuity (VA) is your vision with help (specs or contact lenses) (vision is your vision without help)


Your VA is traditionally written as 6/6 or 6/12 (the bottom number is the level of your vision, the higher the number, the poorer your eyesight.





Without knowing where you have extracted the 2.4 from it is difficult to be exact but, as I said, it may just be the level of your vision written in an alternative way





Hope that's a help
is this like the 20/20 number?


i think the first is the lens strength of a relaxed eyeball, and the second is how far it can focus beyond it's normal state.


i've only had one eye test since school, and i was 20/24, which i gather is good...