Is the prescription for eyeglasses and contact lenses the same with 0.5 CYL in o!
Question: Is the prescription for eyeglasses and contact lenses the same with 0!.5 CYL in one eye !?
recently my son had an eye test!. His old prescription was Right -4!.25; Left -5!.00!. His new eye test was Right -5!.5, 0!.5 CYL, 125 AXIS; Left -6 DS!. Now the Optician did not tell him he needed new contact lens sizes but he did need new eyeglasses as the out come of this new test!. I rang the optician to clarify but couldnt get a straight answer to the following question!
So here is my question - "Do I get my son new contact lenses ( TORIC ) or keep getting him the old strength !?" Note - my son says with his new eyeglasses he can see much better, and now doesn't use his OLD contact lenses as they dont let him see as well as the new eyeglasses!. ps I am not a glasses or lens wearer myself !!!Www@Answer-Health@Com
So here is my question - "Do I get my son new contact lenses ( TORIC ) or keep getting him the old strength !?" Note - my son says with his new eyeglasses he can see much better, and now doesn't use his OLD contact lenses as they dont let him see as well as the new eyeglasses!. ps I am not a glasses or lens wearer myself !!!Www@Answer-Health@Com
Answers:
No, a toric lens isn't needed for a 0!.50 cyl!., 1/2 of it is added to the spherical correction to mask it!.Torics only start at 0!.75 , and even then, is not always needed!.
You didn't put the - or + sign in front of the 0!.50 cyl number which makes a big difference, and we don't know if what you call the old prescription was his glasses prescription or what is on his boxes of contacts!.
Presuming it is a - 0!.50 cyl, then the power for the right eye becomes - 5!.75, but then 0!.50 has to be removed because of the vertex distance ( distance between the lens and his eye ) , so a contact Rx for that eye would become -5!.25 , then the left eye at -6!.00 also has to be lowered by -!.50, so it becomes - 5!.50
Right eye = - 5!.25
Left eye = - 5!.50
That is a fair change from his old prescription and his contacts should be updated to the newer prescription, it's no wonder he isn't seeing well with them anymore!.
EDIT *********************
Ok, so being as it is a + 0!.50 cyl, the right eye for contacts should be a - 4!.75 , but the left stays at - 5!.50
So, both lenses will have increased by -0!.50 from what he was wearing before!.
You will require the actual prescription for contacts from the Dr!. though to order contacts online if that was your idea!.
Merry X-mas to you too, thankyouWww@Answer-Health@Com
You didn't put the - or + sign in front of the 0!.50 cyl number which makes a big difference, and we don't know if what you call the old prescription was his glasses prescription or what is on his boxes of contacts!.
Presuming it is a - 0!.50 cyl, then the power for the right eye becomes - 5!.75, but then 0!.50 has to be removed because of the vertex distance ( distance between the lens and his eye ) , so a contact Rx for that eye would become -5!.25 , then the left eye at -6!.00 also has to be lowered by -!.50, so it becomes - 5!.50
Right eye = - 5!.25
Left eye = - 5!.50
That is a fair change from his old prescription and his contacts should be updated to the newer prescription, it's no wonder he isn't seeing well with them anymore!.
EDIT *********************
Ok, so being as it is a + 0!.50 cyl, the right eye for contacts should be a - 4!.75 , but the left stays at - 5!.50
So, both lenses will have increased by -0!.50 from what he was wearing before!.
You will require the actual prescription for contacts from the Dr!. though to order contacts online if that was your idea!.
Merry X-mas to you too, thankyouWww@Answer-Health@Com
Yes, your son needs new contacts too!. Sometimes the prescription strength for new glasses is different than the one for new contacts, so you do need to ask the eye doctor what his prescription is for new contacts before you order them!.Www@Answer-Health@Com