Hi guys, I'm new around here. Your forum provides a VERY interesting read! I'm going through all the back posts but anyway, I digress :)
Just wondering whats the lowest RX you have dispensed and what is the lowest you will usually hand out if someone complains about a problem with their eyes?
Sorry if I havent worded this well cheers :cheers:
Lowest= .12 cylinder (sort of thing usually precribed by a doctor with his own dispensary and some sort of government program) although I did see one where this was prescribed for a pair of welding goggles.
Heck, -0.25D makes a difference in many cases. pl-0.50x or +0.50 is very useful. That's about as low as you can go, and it matters to some people.
Why ask?
I don't know a great deal about the subject, but I have seen a number of +/- 0.12 and 0.37 eyeglasses for vision therapy patients.Originally Posted by chip anderson
Adam
Just curious :) I have a pretty light prescription myself so I was just wondering whats the lowest RX for glasses that youve handed out. Not in the business (yet) am considering it after my psych degree
That phych degree will come in handy mate!
Lowest was -.25 in left and +.25 in right or vice versa
Yes, the psych degree with help in the world of optics!
Thanks guys I appreciate the feedback :) The world of optics interests me a lot. I'm going to hang around and keep reading the interesting posts and occasionally make a comment or two :shiner:
How about for plano safety?:D
points out (with a cynical smirk) that when I sens somone in for a retest, that 0.25 sometimes seems to make all the difference in the world
I've seen +0.25's but I really wonder why.
I like Foster's beer by the way.
Maybe for some people it makes a difference? im sure that has to be the reason well i think :shiner:
viccles: Sometimes there is more profit in selling a pair of +.25's than there is in telling the patient you don't need glasses. I would contend that for at least 90% of the +.25's precribed and sold this is the reason. I can recall having an employee that had a pair of glasses precribed and sold to her by a local O.D. with the instructions to only wer them for readings. I neutralized the lenses power=Plano. Of course the good doctor could have some non~ecconomic motivation for perscribing this but damn if I could immagine what it was.
The lowest I have seen is -.25. The patient swore they helped driving at night.
I had a woman come in once many years ago when fancy beveled glasses were popular. She had just moved to the area and someone from where she moved from had sold her the sample pair of beveled glasses as her prescription glasses. I don't remember what the prescription was supposed to be but it was low.
She had noticed they didn't help much and was very shocked and disappointed when I told her they had no prescription in them. She remembered that they were ready very quickly after she ordered them and she had told them she was moving away.
Prescribing a refractive power is only part of a prescription, what about prisms (although these are refractive) and clinical tints! These are as much a part of the Rx as the power
Mr. Jordan:
Plano is Plano, no power, including prism and tint. I was talking about a pair of lense that does not deviate the miers in a lensometer at any point. It's pure unethical stealing by taking advantage of a license or degree. So is prescribing anything that is not of benefit to the patient including tests that "protect the practioner."
Chip
Can hardly wait to hear from this.
I have just written a post grad diploma course (20 weeks) on the effects of visual stimulus on neurological systems. (starts next September in UK)
Unnecessary prescribing is I agree unethical, but what of those that do not get a stimulus prescription e.g. a 3 D colour space Rx when it is warranted? Many conditions will only respond if stimulus is taken into account, there is an exciting new future for those who can understand the complexities.Ignorance of the effects of stimulus is to some extent an excuse at the moment, it will not stay that way.
Prisms may be given for a number of reasons, to allow binocular vision e.g. in convergence problems, to change image position and size. A simple Rx is only the start and whilst it usually is sufficient there are many cases in which it is totally inadequate. (PS prisms do change mire position!)
Ian: I don't know about your lensometer but all I have seen except those silly computerised ones, when prism is present the mire moves in the directio of the prism base. And yes, I do concider prism part of the Rx. A plano is no prism, no power, no filter just a refractionless piece of transparency. So why does prism keep coming up in this thread. Trying to make excuses for rip off doc's.
Its sad that some people think of their pockets rather than the consumer :(
the patient could have had a latent RX of +0.25, and the myopic shift which ocours at night time causes the night RX to be -0.25. This shift occours because more of the red wavelength of light is used for night vision, than in the day time. I look seriously at a different RX for night time for all professional drivers
Prisim is part of the prescription - for example if a patient needs
R 0.00DS 6 base 90
L 0.00DS 6 base 270
...then yes they have a plano prescription in terms of cyls and spheres, and they require no RX if they cover one eye up, but no one (not even Mr Ryser) would dispute the need for a ground prism in the above lenses to achieve good binocular vision. What this thread is about is:
"is there the need for very low powered lenses i.e. 0.00, -0.25, +0.25 ds/dc with no prisms to be dispensed?"
the following scenarios would indicate a possible dispensing need:
- when the lens is primarily to carry a tint - sunspex / dyslexia / VDU / fashion
- when there is for example a prescription in one eye, and not in the other e.g. R +3.00, L 0.00
- when the lenses are for some saftey / protective need
- to deal with mypopic shifts at night
- where the patient has no accomadation
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