Stuff I don't know

BigV · 11-09-2010, 12:43 PM

Hello again.

Perhaps Spexxvet will hold forth here, but all helpful answers are welcome.

I am coming to terms with the onset of presbyopia. My vision has been excellent all my life, and remains good, but I can definitely see more clearly with reading glasses (for reading tasks--computer work, driving, walking around--no problem). Even the reading isn't a problem, but the smaller text, or the display on my blackberry is far sharper with my reading glasses.

I bought a few pairs at the drugstore, and I like them. I followed the instructions on the display to guide me to the right magnification and the number I settled on was +1.25.

Here is my question.

There is a very definite sweet spot for focus, 14 inches. I measured it. I'm sure I looked silly holding the ruler against my forehead and sliding my phone along it. My question, my problem is this. When I'm holding a book, or the paper, or the phone at a comfortable distance for the rest of my body, I assure you it isn't 14 inches from the bridge of my nose.

What can I do to get that maximum sharpness of focus which I like to happen farther away, say, 22 to 24 inches, the distance I like to hold my reading material from my face? I have tried the reading glasses with higher magnifications, this made the text bigger, but only at the same distance. It's all big enough, just not sharp enough at my desired distance.

TIA

Gravdigr · 11-09-2010, 01:34 PM

I have the exact same problem. I need a little extra sharpness at arm's length. I don't want the book I'm reading to fall and slap me in the face when I finally manage to fall asleep. I need that joker out there away from my face!

Let us know if you find a cheap solution.

Spexxvet · 11-09-2010, 01:36 PM

D=40/f, where D= dioptric power (your +1.25) and f= focal length in inches. Each .25 represents about 2 inches, when you are totally unable to accommodate. It looks as though you have some ability to accommodate, so your best bet would be to go to the store with your Blackberry and hold it at a comfortable length, then try different powers until you are comfortable. It may that you need more like a +0.75 or +0.50, but you'll be hard pressed to find less than a +1.00 in a store.

11-09-2010, 12:43 PM	#1
BigV Goon Squad Leader Join Date: Nov 2004 Location: Seattle Posts: 27,063	Hello again. Perhaps Spexxvet will hold forth here, but all helpful answers are welcome. I am coming to terms with the onset of presbyopia. My vision has been excellent all my life, and remains good, but I can definitely see more clearly with reading glasses (for reading tasks--computer work, driving, walking around--no problem). Even the reading isn't a problem, but the smaller text, or the display on my blackberry is far sharper with my reading glasses. I bought a few pairs at the drugstore, and I like them. I followed the instructions on the display to guide me to the right magnification and the number I settled on was +1.25. Here is my question. There is a very definite sweet spot for focus, 14 inches. I measured it. I'm sure I looked silly holding the ruler against my forehead and sliding my phone along it. My question, my problem is this. When I'm holding a book, or the paper, or the phone at a comfortable distance for the rest of my body, I assure you it isn't 14 inches from the bridge of my nose. What can I do to get that maximum sharpness of focus which I like to happen farther away, say, 22 to 24 inches, the distance I like to hold my reading material from my face? I have tried the reading glasses with higher magnifications, this made the text bigger, but only at the same distance. It's all big enough, just not sharp enough at my desired distance. TIA __________________ Be Just and Fear Not.

11-09-2010, 01:34 PM	#2
Gravdigr The Un-Tuckian Join Date: Apr 2007 Location: South Central...KY that is Posts: 39,517	I have the exact same problem. I need a little extra sharpness at arm's length. I don't want the book I'm reading to fall and slap me in the face when I finally manage to fall asleep. I need that joker out there away from my face! Let us know if you find a cheap solution. __________________ These statements have not been evaluated by the FDA, EPA, FBI, DEA, CDC, or FDIC. These statements are not intended to diagnose, cause, treat, cure, or prevent any disease. If you feel you have been harmed/offended by, or, disagree with any of the above statements or images, please feel free to fuck right off.

11-09-2010, 01:36 PM	#3
Spexxvet Makes some feel uncomfortable Join Date: Dec 2005 Posts: 10,346	D=40/f, where D= dioptric power (your +1.25) and f= focal length in inches. Each .25 represents about 2 inches, when you are totally unable to accommodate. It looks as though you have some ability to accommodate, so your best bet would be to go to the store with your Blackberry and hold it at a comfortable length, then try different powers until you are comfortable. It may that you need more like a +0.75 or +0.50, but you'll be hard pressed to find less than a +1.00 in a store. __________________ "I'm certainly free, nay compelled, to spread the gospel of Spex. " - xoxoxoBruce

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