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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.

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Would a real narcissist tell you that you could do better than to be with them?

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Asked by Wiki User

It is possible for a narcissist to say this as a manipulation tactic to make themselves appear more humble or garner sympathy. However, their actions are often more telling than their words, so it's important to evaluate their behavior as well.

What lab equipment protects your eyes?

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Asked by Wiki User

Several types of lab equipment are designed to protect your eyes while working in a laboratory setting. Some of the most common ones include:

Safety Glasses: These are the most basic form of eye protection and are typically made of impact-resistant materials like polycarbonate. Safety glasses provide general protection against flying debris, splashes, and minor impacts.

Safety Goggles: Goggles provide more comprehensive protection than safety glasses because they form a seal around the eyes, preventing liquids, vapors, and small particles from entering. They are often used when working with hazardous chemicals, biological materials, or in environments where there is a risk of splashing.

Face Shields: Face shields provide full-face protection, including coverage of the eyes, nose, and mouth. They are typically used in conjunction with safety glasses or goggles when working with chemicals, biological materials, or processes that pose a risk of splashing or spraying.

Eyewash Stations: While not technically equipment worn on the eyes, eyewash stations are an essential safety feature in laboratories. They provide a continuous stream of water to rinse the eyes in case of exposure to hazardous substances or foreign particles.

Fume Hoods: Fume hoods are ventilation devices designed to capture and remove hazardous fumes, gases, or vapors generated during laboratory procedures. By maintaining a negative pressure environment, fume hoods help protect your eyes (and the rest of your body) from exposure to harmful substances.

Biosafety Cabinets: Biosafety cabinets are containment devices used when working with hazardous biological materials, such as infectious agents or recombinant DNA. They provide a physical barrier to protect your eyes and face from exposure to airborne pathogens.

For more information visit our website :Labtron

How can you tell if an antique is real?

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Asked by Wiki User

Determing the condition (or grade) of a coin requires three things: Experience, References and being able to visually inspect the item. Some would argue that visual inspection is not necessary and can be accomplished utilizing photographs. Unfortunately, lighting plays a key factor in hiding/exposing flaws on a coin depending on the reflection and angle. There are many references available, both on the Internet and printed media, to assist in the grading of coins. Simply use any search engine, type the words "Coin Grading" and you will have a host of links to choose from. A good printed source is "The Official American Numismatic Association Grading Standards for United States Coins". This book has reference pictures, as well as, descriptions for each coin in each grade. Whichever resource you choose, ensure that they follow the grading guidelines established by the American Numismatic Association (ANA). Last, but probably most importantly, experience is the key in assigning a grade to a coin. Novice collectors, with some practice, can become quite accurate in determining grades for circulated coins (G-4 through AU-50). It becomes much more difficult when assigning grades for Uncirculated coins (MS-60 through MS-70) or Proof coins (PF-60 through PF-70) and the assistance of an experienced coin collector or trusted coin dealer should be sought. Another option that is available is to have the coin graded by a third-party grading service. For a fee, the grading service will grade the coin, place it in a protective case with it's identifying information and then sonically seal the case to preserve the coin. There are many services to choose from, some reputable and some not. Seek the assistance of a knowledgable collector or dealer in determing a service to use.

What is AAA single eye-glass called?

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Asked by Wiki User

A monocle. There have been a number of versions of spectacles down through the centuries which includes the monocle (which is a single eyeglass lens).
single eye glass?

lens

Why do people need glasses?

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Asked by Wiki User

Some people cannot see clearly so they need the help of glasses so they can see. Some people are long sighted which means they cannot see things up close when reading but they can see things far away. Some people are short sighted which means they cannot see things faraway but can see things close up. However people can be short sighted and long sighted.

Also, many people think people start getting blurry vision in far sight is because they watch too much TV, or play too much video games. But the truth is, that has nothing to do with it. What's really happening is that as people get older from their early ages to adulthood, their eyes will always change. So if your a person that wears glasses, don't think bad of yourself for wearing them, it's just what people go through in life.

How can you calculate the focal length of a lens?

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Asked by Wiki User

A very simple method to calculate the focal length of a lense is to focus it front of the sun and find out a sharp, small point at ground and you have to calculate the distance between that point and lense.... However this gives you approximate result not very accurate resut... For accurate result you have to go in to physics lab and work with optical bench... Thanks

Where can you find a prescription visor?

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Asked by Wiki User

Answer:You may have to go to a special eye doctor. Very hard to find. I'm getting a prescription visor this football season.

Answer:

Your Optometrist or Optician should be able to order any and all types of sport/safety prescription eyewear. Not all prescriptions can be put into all sports items - you may have to go with a a safety/sport goggle or drop in made to fit in or under a helmet.

Note: Not all "chain store" Eye Doctors/Opticians have the ability to order specialty items.

In paintball can they hand out masks that are made for people who wear glasses?

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Asked by Wiki User

It all depends on the goggles you have. If you own any Vforce goggles, most likely yes. Any Events, or I4 goggles, most likely not due to their smaller build. Instead, it is common to purchase thermal lenses to put on your mask.

Disadvantages of cinema?

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Asked by Wiki User

Lack of a social life if watched too frequently perhaps, and maybe even eye strain if not viewed from an appropriate distance.

Why would you need night vision glasses?

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Asked by Wiki User

The pupil dilates in low light conditions to allow more light onto the retina. This will, in many people, result in more near-sighted vision at night than during the day.

If you normally do not wear glasses or have progressed to the point of needing bifocal, trifocal, or progressive lenses (presbyopia) you may need a different prescription to fully correct your vision in low-light environments.

How do reading glasses work?

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Asked by Wiki User

Naturally, to see objects up close, the lens in your eye protrudes more to focus on close objects or writing. The process of focusing on close objects is called accommodation. When a person gets older, often around age 40, the eyes begin to lose their ability to focus on close objects. That condition is called presbyopia (from Latin, literally meaning "old eyes"). Anyway, the retina is the part of the eye that sends the image to the brain. The problem here is that light focuses behind the retina rather than on it.

Lenses to correct presbyopia and hyperopia (farsightedness) are convex lenses, meaning the lenses are the thickest in the center. They cause light to converge, meaning they cause light waves to bend closer together. So the eyeglasses adds enough power to the natural lens so when you look at things close up, the light rays converge into a point sooner, thus focusing directly on the retina.

Where can you get a free eye exam?

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Asked by Wiki User

If you're looking for free eye exam, visit VISION USA™It provides free eye exams to eligible, low income working families who have no health insurance of any kind, allowing some low income working Americans the benefits of better vision.

If you haven't had an eye exam for the last two years and can meet the strict requirements, you might be eligible for a free comprehensive eye exam.

VISION USATM application question excluding low income individuals who have health insurance without eye care coverage

Covered by Private or Government Insurance, Medicare or Medicaid _____ No _____ Yes (if yes, not eligible even if eye care is not covered)

Why were bifocals invented?

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Asked by Wiki User

Bifocals are used for distance seeing or at close up seeing.

Why do people make fun of people with glasses?

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Asked by Wiki User

Because they are immature and/or ignorant. If someone judges you on how you look, ignore them.

What does it mean if your vision prescription is plus 4.25?

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Asked by Wiki User

That means,

You're eyes aren't what they used to be when you were not playing on a gameconsole or on a computer or watching tv not to long.

am sorry dude

What Medicaid pay for eye care?

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Asked by Wiki User

medicare does not cover vision care, i assume medicaid does not either

Is it bad for your eyes to read a book while lying down?

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Asked by Wiki User

Any damage to your eyesight depends on the light you have and the distance you are holding the book, not your position in bed. The reading as far as it is calming and not an upsetting subject, is what helps to fall asleep, not the position.

What are the best eyeglasses?

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Asked by Wiki User

Hello there,

Before looking at type of eye glasses we should think about which factors we should analyze while choosing spectacular frames & lenses. Nowadays, eyeglasses are one of daily accessories, mostly used for improve vision, protecting eyes from harmful rays & for attractive appearance of individual. However selecting suitable eye ware is bit overwhelming but not so difficult there many companies such as lens kart, yourspex & titan eye plus sites offers virtual try on feature which provides them more flexibility & idea over lenses & frames.

Following are some factors we should consider during buying process of eye glasses.

faceshape

skintone

lifestyle

personality

Eye expert consultant

One can use the following tips to find the spectacles frames for men and women that work best for his/her style.

Why are glasses called spectacles?

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Asked by Wiki User

Spectacles predates glasses by about 200 years but essentially means the same thing. Spectacles comes from a word meaning "to observe" while glasses comes from what the spectacles were, and are, made from.

What rods are to light intensity as cones are to?

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Asked by Benben1

rod cells are to intensity of light as con cells are to colour.

Can using a pair of glasses lower than your regular prescription damage your eyes?

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Asked by Wiki User

No, they do not, Glasses work by altering the way light reaches your eyes. This is equivalent to the way the lens inside your eye works. All it does is correct for an aberration in the shape of your eyes, allowing you to bring objects in focus.

Why can nearsighted people see better underwater than people with 20 20 vision?

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Asked by Hockeynl

When light changes from traveling in one medium to another, it will 'bend' or refract. However, water and your eye basically have the same refractive index, so the light will barely bend (unlike in air.) Your lens can't properly compensate for the lack of the refraction, so a normal person would become more farsighted, a farsighted person would become even more farsighted. However, a severely nearsighted person would get closer to normal as their eye defects compensate more for the lack of refraction.

Will lasik work if I need glasses for near-sightedness and reading?

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Asked by Wiki User

From this question, it seems that you are probably over 40 years old and you are currently in bifocals for near vision with nearsighted correction for distance on the top part of your glasses. We see many patients with this situation and LASIK can work for you, and here is how.

First of all, the LASIK can correct the vision for the distance vision assuming that you are otherwise a candidate for this procedure. It can correct fairly large amounts of nearsightedness as well as astigmatism. This solves your distance vision issue, but not the near vision.

For near vision you would have a choice of either getting some "over the counter" type reading glasses, or you could have one eye purposely undercorrected for monovision. In monovision one eye is focused for distance whereas the other for near. Many have worn contact lenses with this configuration successfully and it works for a lot of people with LASIK but a word of caution.

Not everyone like monovision. It can reduce the depth perception, and for people who critically need sharp distance vision may not be ideal. You should try this with simulation by contact lenses or glasses before making this a permanent change. The other option is to have what is known as modified monovision, and here the one eye is left less nearsighted which makes this an easier transition. The downside is that you would still need some glasses for reading smaller print. Your doctor can review these different options with you and help you to pick out which if any type of monovision would work for you.

We see many patients over the age of 40 who are extremely happy with their LASIK correction. Many do not mind reading glasses alone, and some are pleased with monovision. It really depends on how nearsighted you are to begin with. In general if you are very dependent on glasses, you will appreciate this, but if you can take your glasses off and read well, you might not be a good candidate.

Do you need glasses for astigmatism?

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Asked by Wiki User

I have the exact same prescription. The 1.25 is in my dominant eye tho so its been bugging me enough to get a pair of glasses to have for night driving and days of intense studying/reading. If you're getting headaches or squinting it may be time.

Is a glasses prescription with OD -0.25 OS plus 1.75 powerful or mild?

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Asked by Nokuta

Your right eye RX (OD) is very weak. Your left eye RX (OS) is rather mild.

-US Navy Optician