Always good stuff sir! BTW I still feel poly is an atrocious material and will use trivex when a doctor circled Poly for a child. So annoying though that doctors feel that they have control over the lens design also.
Hello ~ I finally found a lense (non prescription) that I want to wear BUT I need a lab to change the non prescription to my prescription (3 month new prescription). I'm having a hard time finding a lab to do this change because of the 2 screws on the side of the lense attached to the front temple part. Can you help me. I have a picture of the new glasses if you'd like to see. Thank you
You can send me a picture to the email found on the OpticianWorks website and I'll take a look. I will say up front that many frames sold with non-Rx lenses are not meant to have an Rx lens inserted. John
For a standard Rx = SPH : CYL : Axis : ADD Is the "SPH : CYL : Axis" for corrected Distance Rx? Is the "ADD" for a 15" focal distance Rx for reading? Is there an equation for a desired focal (FD) distance ADD values based on Rx? FD= f(Rx) Is there an equation for the field of view for a FD?
@@LaramyKOptical Thanks The focal distance curve appears to be non-linear and dependent on the Rx ADD value for reading at about 15" away. I have bifocals for intermediate/reading The focal distances i measured are 28" / 15" (standard distances) If a client wanted say 36" / 20" or a specific value for close work of 6" away, how is that ADD calculated? Is there a video on this?
@@randwillard3719 Honestly beyond D = 1/f or f = 1/D I'm really not sure. I'd grab a 0.25 0.50 -0.25 -0.50 flipper and see what works for them. Or just hold up SV spheres over their distance until they say, Yep!
I would love to have glasses that are like bifocals but have no prescription in the bottom of the lens. I am near sighted and I constantly have to remove my glasses when looking at things close up. I like to knit while I watch tv and I have to choose whether I want to see the tv or my knitting better. When I was trying to capture a photo of a bird on my feeder today I needed the glasses for distance but could not see my camera display to see if I got a good shot. I have called 3 different local doctors and they say you can’t get those. I have a near sighted friend who has the same issue and I’m sure there are many like us. Is it possible to get the glasses I describe and if so what are they called?
You need to track down a good independent optician NOT a doctor - they wouldn't understand. It is custom hand work so you will need to pay out of pocket. The lens materials are inexpensive so it shouldn't be crazy expensive. Drop me an email through the OpticianWorks website and I'll see if I can find anyone. I know of two places that do a lot of occupational work.
@@LaramyKOptical Thank you so much for your reply. I emailed my question to a local optician and this was her response. “Here's the thing--when a lined bifocal lens is made, an additional lens is cut and fused to the base lens for the "add" or near power. Since a lens is being added, there can never be a bifocal lens with "no prescription" in that lower portion. To get a net "0" power in that part of the lens, we'd need to add the amount of power to effectively cancel the prescription you need for distance. This works in theory, but not usually as well in real life. To make a better recommendation, I'd need more information about your current prescription--then I'd be able to let you know what options you have for glasses. Also, keep in mind that, like shoes(some for casual wear, some for dressing up, some for working out, etc), one pair may be good for most of your daily activities, but you may need to consider adding glasses to use for specific tasks you do regularly.” The thing is the issue is constant all day every day. When I look at my phone I move my glasses down to my chin and back up when I’m done. When I’m cooking they’re on and off multiple times to see the recipe and the size of cups and teaspoons etc. At restaurants; off to see the menu, back on to look around, back off when the food comes. I don’t really understand what she was saying about net 0 power, but I think she will just try to get me to put a magnification in that lower lens like my regular eye doctor did. I’d like to use my own vision for up close while I still can.
I tried contacts for a while this year and just using readers for up close but I can see better up close with my own vision, and my glasses were also better for distance than the contacts so I’m trying to go back to them. Sorry such long comments. I appreciate your time in responding to me.
What is the reason for using the spherical equivalent for a balance as oppose to just matching it? And if an Rx is expired, is that law? Can I just fill it anyway? Or does it depend on the state?
Cost savings. You can often use a stock SV lens in place of a costly progressive for instance. Only you can decide how you will deal with an "expired" prescription. Here are my thoughts... 1) Eyeglass lenses are just pieces of plastic.* They don’t expire. - there is no “grey area” no “but - if.” Pieces of plastic don’t expire. Unless damaged a lens is the same two years after it was made as the day it was first dispensed. 2) Refraction or, “What is better 1 or 2?” is subjective. That means that I choose what I feel is adequate vision for me. It is a personal choice. I am free to decide if I am perfectly happy with my current “eyeglass prescription.” It is MY CHOICE, MY DECISION not any optician's or any doctor’s to make. Not really much different than my deciding to smoke or take vitamins. 3) State license boards exist to protect the citizens of that state. They do not exist to protect opticians. They do not independently stake-out optical shops. It seems quite unlikely that an individual would enter a store, ask to make them a pair of glasses and then when you did report you to the state board. 4) There is no optician police force. The FBI doesn’t have an Optician Special Crimes Unit. No state has an Optical Retail SWAT Team. States are all grossly underfunded and most of those boards are little more than a sham for collecting fees. If you make someone a pair of glasses without the aid of a bunch of numbers written on a piece of paper nothing bad is going to happen to you. 5) Be more! If someone comes into your store and asks you to make them a pair of glasses just like the power they have now - Make them the best darn pair of glasses they ever had. If you feel it is appropriate then, by all means, encourage them to get an eye exam. Like I always said, “I’ll be glad to make you a new set of glasses. They will be around $300 so wouldn’t it be better to be sure?” If they say, “No, I’m good.” Then make them a pair of glasses. Because here is what it is all about. If you don’t make those glasses, it is just another nail in the coffin for brick-and-mortar opticianry. Because those online eyeglasses places sure will in a heartbeat! Opticians make glasses.
I am with you on this John. I recommend a check up. Especially if they haven’t seen a doctor for a number of years for eye health reasons. But Rx’s for glasses should not have an expiration date. The sad reality is though that if people were allowed to they wouldn’t ever update their Rx and undetected health concerns could go untreated for too long. So sadly we have to help people protect themselves.
@@eyecraveoptics7475 yeah I get the cost savings part. I was wondering why you said use a special equivalent on a sv ex. And about the prescription... the law is you have to have a rx to get a pair of glasses? Like contacts. It was unclear. It seemed like it was up for interpretation.
@@matthewbalas5610 "...use a special equivalent on a sv ex." I assume that should read Rx but - obviously for any SV that falls within stock range you can do whatever you like. Once you get into surface powers then it just makes sense to take the easiest route possible. It's not a rule, law, or any kind of must-do just a rule-of-thumb we were taught. If the R is a -5.00 -3.50 X 90 and you want to make the L -5.00 -3.50 X 90 sure!
The optometrist I see always wants to see my glasses or get my prior prescription before checking my vision. Why? Is this a way of checking the new prescription against my old prescription? Is it a crutch for them to use in order to shorten my evaluation? Why can't they just check my eyes without any prior knowledge in order to get an unbiased new prescription? I ask these questions because I've not been fully satisfied with my last 2 pairs of glasses over a time span of 5 years. With curiosity I ordered a pair of near-sighted glasses from Fullwosing through Amazon. I simply picked the strength closest to my prescription: OD -1.50 -0.25 x 102, OS -1.25 -0.25 x 165, PD 64. The strength I picked was -1.25 and when I received the glasses I compared them very carefully (both eyes, left eye, right eye) to my standard prescription glasses. The Fullwosing glasses were better across the board with clarity and clearness of letters with distance vision looking at wording on road signs while driving. I also have a Snelling Chart and the Fullwosing are better than my prescription glasses with it, too. Hmmm ... what could possibly be going on here? By the way, the prescription glasses are $450.00 and the Fullwosing $20.00.
I could go on for an hour here... You just happen to be lucky and the 0.25 middle number (cylinder) is negligible to unnecessary. If that was 2.50 then those off-the-shelf glasses wouldn't/couldn't work. (or 1.25 or even 0.75) Unless there is a physiological reason, eyeglass lens powers really don't change more than a +/-0.75 in any direction year after year after year.* So yes, the optometrist is using your past as a base line. REMEMBER - YOU yes YOU chose which was better 1 or 2? They didn't. This is straight from the Consumers Guide: Psst… Insider Tip #2: If you wear glasses then bring them with you to your exam. Don’t think that having the doctor “starting from scratch” will change anything. Don’t pull the, “Well you tell me doc.” The only thing that will happen is that you will seriously tick off the doctor! The very person that is trying to help you. I'm sure you have picked up by now that I'm in the glasses are a commodity camp. If you don't like the refraction you get from your current optometrist then go to a different one. If you don't like the glasses you get from XYS Optical then return them and buy from another place. And heck - if the $20 ones work well then buy 'em and wear 'em! No one is going to die here... Yes, a human is perfectly able to self-select a pair of glasses that work for them. No different than, "which is better 1 or 2," right? *BUT - BIG BUT - keep getting those medical eye exams to avoid blindness! A medical eye exam is important part of your physical well being. John
@@Ferozzzzzz Still not enough but: If you have 0.00 -0.25 X 180 OU then you have nothing. 0.25 is basically nothing. Not worth making - not worth spending any money on. Even 0.00 -0.50 isn't worth making.
@@LaramyKOptical thnx a ton.. doc has given me a blue cut eye glasses with axis and -0.25 power... Should i not wear that. Will it harm my eyes if i wear it. Or should i wear simple blue cut while using laptop and phone.. Thanking u sir
@@Ferozzzzzz Blue light is like religion and politics - some people believe in it some don't and I'm not getting in the middle of it either way. In my opinion if you are worried about blue light just buy a pair of 0.00 and be happy. Heck you might luck out and get a 0.25 of cylinder for free.
Watching from UK- really enjoyed! Thanks
Thank you, Lionel!
Great John. Thank you for sharing. God bless you.👋💝
Thanks for watching!
Always good stuff sir! BTW I still feel poly is an atrocious material and will use trivex when a doctor circled Poly for a child. So annoying though that doctors feel that they have control over the lens design also.
Is it normal to have an Axis of 180 in the Left eye and 011 in the right eye.
What does that mean?
Yes it’s normally 🤓
Hello ~ I finally found a lense (non prescription) that I want to wear BUT I need a lab to change the non prescription to my prescription (3 month new prescription). I'm having a hard time finding a lab to do this change because of the 2 screws on the side of the lense attached to the front temple part. Can you help me. I have a picture of the new glasses if you'd like to see. Thank you
You can send me a picture to the email found on the OpticianWorks website and I'll take a look. I will say up front that many frames sold with non-Rx lenses are not meant to have an Rx lens inserted. John
For a standard Rx = SPH : CYL : Axis : ADD
Is the "SPH : CYL : Axis" for corrected Distance Rx?
Is the "ADD" for a 15" focal distance Rx for reading?
Is there an equation for a desired focal (FD) distance ADD values based on Rx? FD= f(Rx)
Is there an equation for the field of view for a FD?
Yes the ADD is about your near distance.
Full add for near and half the add for intermediate.
There are a couple of videos about that.
John
@@LaramyKOptical Thanks
The focal distance curve appears to be non-linear and dependent on the Rx ADD value for reading at about 15" away.
I have bifocals for intermediate/reading
The focal distances i measured are 28" / 15"
(standard distances)
If a client wanted say 36" / 20" or a specific value for close work of 6" away, how is that ADD calculated?
Is there a video on this?
@@randwillard3719 Honestly beyond D = 1/f or f = 1/D I'm really not sure. I'd grab a 0.25 0.50 -0.25 -0.50 flipper and see what works for them. Or just hold up SV spheres over their distance until they say, Yep!
I would love to have glasses that are like bifocals but have no prescription in the bottom of the lens. I am near sighted and I constantly have to remove my glasses when looking at things close up. I like to knit while I watch tv and I have to choose whether I want to see the tv or my knitting better. When I was trying to capture a photo of a bird on my feeder today I needed the glasses for distance but could not see my camera display to see if I got a good shot. I have called 3 different local doctors and they say you can’t get those. I have a near sighted friend who has the same issue and I’m sure there are many like us. Is it possible to get the glasses I describe and if so what are they called?
You need to track down a good independent optician NOT a doctor - they wouldn't understand. It is custom hand work so you will need to pay out of pocket. The lens materials are inexpensive so it shouldn't be crazy expensive. Drop me an email through the OpticianWorks website and I'll see if I can find anyone. I know of two places that do a lot of occupational work.
@@LaramyKOptical Thank you so much for your reply. I emailed my question to a local optician and this was her response. “Here's the thing--when a lined bifocal lens is made, an additional lens is cut and fused to the base lens for the "add" or near power. Since a lens is being added, there can never be a bifocal lens with "no prescription" in that lower portion. To get a net "0" power in that part of the lens, we'd need to add the amount of power to effectively cancel the prescription you need for distance. This works in theory, but not usually as well in real life. To make a better recommendation, I'd need more information about your current prescription--then I'd be able to let you know what options you have for glasses. Also, keep in mind that, like shoes(some for casual wear, some for dressing up, some for working out, etc), one pair may be good for most of your daily activities, but you may need to consider adding glasses to use for specific tasks you do regularly.”
The thing is the issue is constant all day every day. When I look at my phone I move my glasses down to my chin and back up when I’m done. When I’m cooking they’re on and off multiple times to see the recipe and the size of cups and teaspoons etc. At restaurants; off to see the menu, back on to look around, back off when the food comes. I don’t really understand what she was saying about net 0 power, but I think she will just try to get me to put a magnification in that lower lens like my regular eye doctor did. I’d like to use my own vision for up close while I still can.
I tried contacts for a while this year and just using readers for up close but I can see better up close with my own vision, and my glasses were also better for distance than the contacts so I’m trying to go back to them. Sorry such long comments. I appreciate your time in responding to me.
@@throughtheenchantedportal6617 I'd help you out but I don't have the equipment anymore. You might point that optician to the video?
@@LaramyKOptical Okay thanks anyways. I will keep trying to find someone, and if I decide to go with her I will let her know about the video.
What is the reason for using the spherical equivalent for a balance as oppose to just matching it? And if an Rx is expired, is that law? Can I just fill it anyway? Or does it depend on the state?
Cost savings. You can often use a stock SV lens in place of a costly progressive for instance. Only you can decide how you will deal with an "expired" prescription. Here are my thoughts...
1) Eyeglass lenses are just pieces of plastic.* They don’t expire. - there is no “grey area” no “but - if.” Pieces of plastic don’t expire. Unless damaged a lens is the same two years after it was made as the day it was first dispensed.
2) Refraction or, “What is better 1 or 2?” is subjective. That means that I choose what I feel is adequate vision for me. It is a personal choice. I am free to decide if I am perfectly happy with my current “eyeglass prescription.” It is MY CHOICE, MY DECISION not any optician's or any doctor’s to make. Not really much different than my deciding to smoke or take vitamins.
3) State license boards exist to protect the citizens of that state. They do not exist to protect opticians. They do not independently stake-out optical shops. It seems quite unlikely that an individual would enter a store, ask to make them a pair of glasses and then when you did report you to the state board.
4) There is no optician police force. The FBI doesn’t have an Optician Special Crimes Unit. No state has an Optical Retail SWAT Team. States are all grossly underfunded and most of those boards are little more than a sham for collecting fees.
If you make someone a pair of glasses without the aid of a bunch of numbers written on a piece of paper nothing bad is going to happen to you.
5) Be more! If someone comes into your store and asks you to make them a pair of glasses just like the power they have now - Make them the best darn pair of glasses they ever had.
If you feel it is appropriate then, by all means, encourage them to get an eye exam. Like I always said, “I’ll be glad to make you a new set of glasses. They will be around $300 so wouldn’t it be better to be sure?” If they say, “No, I’m good.” Then make them a pair of glasses.
Because here is what it is all about. If you don’t make those glasses, it is just another nail in the coffin for brick-and-mortar opticianry. Because those online eyeglasses places sure will in a heartbeat!
Opticians make glasses.
I am with you on this John. I recommend a check up. Especially if they haven’t seen a doctor for a number of years for eye health reasons. But Rx’s for glasses should not have an expiration date. The sad reality is though that if people were allowed to they wouldn’t ever update their Rx and undetected health concerns could go untreated for too long. So sadly we have to help people protect themselves.
@@eyecraveoptics7475 yeah I get the cost savings part. I was wondering why you said use a special equivalent on a sv ex. And about the prescription... the law is you have to have a rx to get a pair of glasses? Like contacts. It was unclear. It seemed like it was up for interpretation.
@@matthewbalas5610 "...use a special equivalent on a sv ex." I assume that should read Rx but - obviously for any SV that falls within stock range you can do whatever you like. Once you get into surface powers then it just makes sense to take the easiest route possible. It's not a rule, law, or any kind of must-do just a rule-of-thumb we were taught. If the R is a -5.00 -3.50 X 90 and you want to make the L -5.00 -3.50 X 90 sure!
Genius!
I'm not sure I'd go quite that far - but - that video is actually one of my all time favorites. Thanks John
The optometrist I see always wants to see my glasses or get my prior prescription before checking my vision. Why? Is this a way of checking the new prescription against my old prescription? Is it a crutch for them to use in order to shorten my evaluation? Why can't they just check my eyes without any prior knowledge in order to get an unbiased new prescription? I ask these questions because I've not been fully satisfied with my last 2 pairs of glasses over a time span of 5 years. With curiosity I ordered a pair of near-sighted glasses from Fullwosing through Amazon. I simply picked the strength closest to my prescription: OD -1.50 -0.25 x 102, OS -1.25 -0.25 x 165, PD 64. The strength I picked was -1.25 and when I received the glasses I compared them very carefully (both eyes, left eye, right eye) to my standard prescription glasses. The Fullwosing glasses were better across the board with clarity and clearness of letters with distance vision looking at wording on road signs while driving. I also have a Snelling Chart and the Fullwosing are better than my prescription glasses with it, too. Hmmm ... what could possibly be going on here? By the way, the prescription glasses are $450.00 and the Fullwosing $20.00.
I could go on for an hour here...
You just happen to be lucky and the 0.25 middle number (cylinder) is negligible to unnecessary. If that was 2.50 then those off-the-shelf glasses wouldn't/couldn't work. (or 1.25 or even 0.75)
Unless there is a physiological reason, eyeglass lens powers really don't change more than a +/-0.75 in any direction year after year after year.* So yes, the optometrist is using your past as a base line.
REMEMBER - YOU yes YOU chose which was better 1 or 2? They didn't.
This is straight from the Consumers Guide:
Psst… Insider Tip #2: If you wear glasses then bring them with you to your exam. Don’t think that having the doctor “starting from scratch” will change anything. Don’t pull the, “Well you tell me doc.” The only thing that will happen is that you will seriously tick off the doctor! The very person that is trying to help you.
I'm sure you have picked up by now that I'm in the glasses are a commodity camp. If you don't like the refraction you get from your current optometrist then go to a different one. If you don't like the glasses you get from XYS Optical then return them and buy from another place. And heck - if the $20 ones work well then buy 'em and wear 'em! No one is going to die here... Yes, a human is perfectly able to self-select a pair of glasses that work for them. No different than, "which is better 1 or 2," right?
*BUT - BIG BUT - keep getting those medical eye exams to avoid blindness! A medical eye exam is important part of your physical well being.
John
@@LaramyKOptical Thanks John. That's a great explanation.
OD: SPH: +0.75 CYL:-4.75 Axis: 5
OS: SPH: +0.75 CYL:-4.50 Axis: 180
can you help me please to convert this please.
@Laramy-K Optical
(B/E) -0.25 Dcyl ×180 °. Explain this prescription
I'll need a little more to go on. I'm not familiar with (B/E) There has to be another power before the -0.25.
@@LaramyKOptical B/E is i think both eyes.
Rx is VA < 6/6 B/E
B/E -0.25 Dcyl x 180°
@@Ferozzzzzz Still not enough but: If you have 0.00 -0.25 X 180 OU then you have nothing. 0.25 is basically nothing. Not worth making - not worth spending any money on. Even 0.00 -0.50 isn't worth making.
@@LaramyKOptical thnx a ton..
doc has given me a blue cut eye glasses with axis and -0.25 power... Should i not wear that. Will it harm my eyes if i wear it. Or should i wear simple blue cut while using laptop and phone.. Thanking u sir
@@Ferozzzzzz Blue light is like religion and politics - some people believe in it some don't and I'm not getting in the middle of it either way. In my opinion if you are worried about blue light just buy a pair of 0.00 and be happy. Heck you might luck out and get a 0.25 of cylinder for free.
This is single vision.