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Glasses and Eyewear
Glasses or spectacles are frames which hold corrective lenses and are worn in front of the eyes on the face. Frames come in many shapes, colors and styles. Lenses help correct; nearsightedness, farsightedness and other eye disorders. Some spectacles are magnifiers and opera glasses. Ask questions here about lenses, bifocals, progressive lenses, and prescriptions here.
495 Questions
Did the ancient Greeks use glasses?
No. They used neither eyeglasses nor drinking glasses. If you couldn't see, you couldn't see, that's all. And they drank from cups, not glasses.
Ive been trying to find them since the video came out, can't seem to find anything.
Where did Benjamin Franklin invent the bifocal?
In his house in Philly because he got tiered of taking off and putting back on his glasses when he wanted to read. So he got 2 lenses and set his mind to work!
How do you convert bifocal prescription to reading prescription?
You add the part of the prescription that called the Add to the part called the Sphere. If your prescription contains Cylinder or Axis those numbers stay the same. Example: Your prescription is Sphere -1.00 Cyl -0.25 Axis 090 Add +2.00. Your reading prescription would be Sphere +1.00 Cyl -0.25 Axis 090 with no add.
How do bifocals help us today?
Bi means two, focal means to focus, so Bifocal glasses help you with both short sight and long sight.
What are the advantages and disadvantages of bifocal eye glasses?
Bifocal eyeglasses provide the convenience of correcting both near and distant vision in a single lens, allowing users to transition seamlessly between tasks without needing to switch glasses. However, they can sometimes cause visual distortion at the edges of the lenses and require an adjustment period for new users. Additionally, some individuals may find the visible line separating the two lens prescriptions unappealing. Overall, while bifocals are practical for many, they may not suit everyone's aesthetic preferences or visual needs.
yes, if we unlock 50% of our brains because the human mind uses only 10% of it's power for physical purposes if we had 50%, we would be able to see the thoughts of another person.....
What does 10 meq mean on my prescription?
MEG on a script means milliequivalent & doesn't really tell you the measurement, it must be for potassium; it's very thought provoking I too have been trying to figure this out. you just want to know the mg huh? Evie mEq is used to denote an amount of a solute in a liter of solvent (i.e. the blood).
For instance, potassium (K) is often measured as mEq/L or mEq/dL. 10 mEq is equivalent to 750 mg, USP. -See related link: DailyMed.
After some research using various websites, the typical K intake per day is ~ 3.5 grams (3500 mg.). At the same time the usual K intake is stated elsewhere as 50-100 mEq/day. So, 1 mEq is somewhere in the range [70 mg, 35 mg.] (i.e., 3500/50 to 3500/100). Using the mid-point of the 50-100 mEq range (75), we get: 1 mEq ~ 46.7 mg -or-
10mEq ~ 467 mg.
A harder question is: If you start taking an additional 20 mEq of K today, how long does it take to show up in a blood test ?
Who made the first pair of jeans and when?
Levi Strauss(1829-1902) in 1873. He invented and patented it. He it invented for people would have comfortable working jeans.
- John Williams
Professor
