Can carrots help improve blurred vision, like myopia or hyperopia? I don't think so, but what do you know?
Can it help with myopia (near-sightedness) or hyperopia (far-sightedness)? No, these conditions are caused by the shape of the eye itself. However, carotene does help you see colors better and helps night vision recovery, because it is the main chemical your eye's rods and cones use to react to light and recover after sending their nerve impulse to the visual cortex. The more carotene, the faster you can see in the dark (night vision).
Hyperopia presecription error?
My dad has mild hyperopia. His distance diopter is +1.75, reading +2.25 and some mild cylinder. Both left and right eye presriptions are similar. He's been using progressive lenses for 8+ yrs now. Going for an eye exam he wanted to get new glasses. The new prescription increased his distance to about +2.75 for both eyes. Trying out the new prescription on a new frame, his far distance sight (>100ft) is now blurred. He can no longer drive safely. The optometrist doesn't seem to know what's wrong. The new lenses checks out ok exactly like prescribed and using the new pair of glasses, my dad gets 20/30 on the eye exam, but far distance vision for 100+ feet is still very blurry. Using his old glasses (+1.75 far distance) is better than the new glasses (+2.75 far distance), but medium distance (2-3 ft) is better with the new glasses. What to do? Advice?
How can Plus lenses correct distance vision?
I am studying to be an optician. In my text book it states that Plus lenses are used to correct Hyperopia or farsightedness, and minus lenses are used to correct Myopia or nearsightedness. This all makes sense to me for the most part. What confuses me is how many plus lenses I dispense on a weekly basis that are used to correct distance vision. If plus lenses are only for farsightedness correction, the how come all these people use plus lenses for distance correction as well? Or are the terms "nearsightedness" and "farsightedness" used not to describe what the person is capable of seeing, but rather for example "farsightedness" is a condition where the light goes too far and passes the retina? Is that what these terms are supposed to mean? I assume not - I just am very confused. I personally have a plus lens in one eye and a minus in the other. Both help me with distance and both are not incredibly strong - so i know that obviously both are possible. But based on what the book says only farsighted people use plus lenses & its definitely not 'near vision' I have a problem with.
I'm nearsighted. Things at a distance seem blurry. Should I wear my glasses all the time, e.g. when using a laptop or cell phone? If I wear them all the time, would they affect my eyesight in any way? Will it get better or worse?
I’m speaking for myself, as I can only realistically answer that you need to listen to your optometrist.I am near-sighted. I have no problem seeing up close, so there is no point in me wearing my glasses for, well obviously looking something up close.But I do not take them off just because I want to see close. Because if I were to do that, I would find myself constantly taking them off and putting them back on. It is a complete waste of time. I only take them off when I go to sleep.I also have a low prescription, so I can see fairly well without them. But if I don’t, I feel weird, like naked.To answer the second part of your question (“If I wear them all the time, would they affect my eyesight in any way? Will it get better or worse?”), yes. Your eyesight will be affected. Your eyes will accustom to your prescription, and eventually turn worse as you wear it. So after some time, you might need a new pair.Now, I doubt looking close up with a near-sighted prescription will have any adverse affects. I do it all the time, and my eyesight hasn’t worsened.
Can you have both astigmatism and hyperopia/myopia?
Yes. Myopia and hyperopia are often accompanied by at least some astigmatism. If you have both myopia and astigmatism, everything is blurry but far distance is most blurry. Astigmatism is basically radial asymmetry of focus which means, for example, that you might not be able to focus both the horizontal and vertical edges of an object at the same time. It's just another type of refractive error which prevents light rays being focused to a sharp point on the retina, and it can add to the blur caused by myopia or hyperopia.
Explain hyperopia fully.?
Hyperopia, also known as farsightedness, longsightedness or hypermetropia, is a defect of vision caused by an imperfection in the eye (often when the eyeball is too short or the lens cannot become round enough), causing difficulty focusing on near objects, and in extreme cases causing a sufferer to be unable to focus on objects at any distance. As an object moves toward the eye, the eye must increase its optical power to keep the image in focus on the retina. If the power of the cornea and lens is insufficient, as in hyperopia, the image will appear blurred. Hyperopia, and restoring of vision with convex lens.People with hyperopia can experience blurred vision, asthenopia, accommodative dysfunction, binocular dysfunction, amblyopia, and strabismus Hyperopia is often confused with presbyopia, another condition that frequently causes blurry near vision. Presbyopes who report good far vision typically experience blurry near vision because of a reduced accommodative amplitude brought about by natural aging changes with the crystalline lens It is also sometimes referred to as farsightedness, since in otherwise normally-sighted persons it makes it more difficult to focus on near objects than on far objects. The causes of hyperopia are typically genetic and involve an eye that is too short or a cornea that is too flat, so that images focus at a point behind the retina. People with hyperopia can usually see distant objects well, but have trouble focusing on nearby objects.
Is it possible to induce myopia by hyperopic defocus? I mean if I wear minus/negative lenses everyday on an emmetropic eye (eye with normal vision), does the eye accommodate and cause axial elongation, thus myopia/nearsightedness?
Yes! If you have emmetropic eyes, wear minus lenses(starting with -3.50D or -4.00D) and do lots of close up work for long periods of time (day after day, month after month) while wearing the minus lenses, slowly, your pseudomyopia(ciliary muscle spasm) will cause your eye balls to elongate. Inducing axial myopia in adults is 100% possible, but the process is a little bit faster in childhood. The only time I think that inducing myopia may not be possible is if the person is their 40- 50’s because at that time they'd have developed “presbyopia (hardening of the crystalline lens in the eyes - produces a similar effect to hyperopia - distance vision is good but close uo vision is blurry). So, get your minus lenses(over correction) and start inducing myopia. You can search on google for “vision and spex”, it's a forum for eyeglasses, myopia, hyperopia, astigmatism,etc… so, you join the “inducing myopia” section on “vision and spex”. If you wanna learn more about inducing myopia, we could talk on “vision and spex” forum.Enjoy, and “Happy Inducing Myopia!”
How do people with myopia/hyperopia see at all?
Both Myopia (short-sightedness) and Hypermetropia (long-sightedness) are common eye conditions that mean light does not focus on the retina of the eye. Both conditions can be easily corrected using prescription glasses or contact lenses.Myopia - Short SightedMyopia is the term used to define short sightedness. Light from a distant object forms an image before it reaches the retina. This could be because the eye is too long, or the cornea or crystalline lens is too strong.A myopic person has clear vision when looking at objects close to them, but distant objects will appear blurred.Myopia is easily corrected using prescription glasses or contact lenses specifically designed to counteract the effect. A concave lens (minus powered) is placed in front of a myopic eye, moving the image back to the retina and clarifying the image. Diagram-1Hypermetropia (Hyperopia) - Long SightedHypermetropia means long sight and is where the image of a nearby object is formed behind the retina. This could be because the eye is too short, or the cornea or crystalline lens does not refract the light enough.A hypermetropic person may have blurred vision when looking at objects close to them, and clearer vision when looking at objects in the distance. By placing a convex (plus powered) lens in front of a hypermetropic eye, the image is moved forward and focuses correctly on the retina. Diagram-2Hope this clarifies :)Edit- To clarify more,Distant objects represent rays of light coming from infinity, hence they converge before the retina like this- But when object is near this happens:-Making the image fall on the retina. Hence, the close by objects still appear clear but far objects don't.
Far sighted glasses blurry?
Hi. So I went to the eye doctor the other day and he told me I was very farsighted. I have lots of trouble seeing in the dark. So I got my glasses the other day (not sure what the Perscription is) and he tells me I need to wear them full time. But everything in the distance is blurry. Everything near me I can see clearly and great, but do you think the blurry ness in the distance is just an adjusting period? He said it may look blurry for about a week but this is reallllllyyyy blurry
Why is my left eye sometimes a bit blurry?
A few days ago my left eye would sometimes feel blurry but i can see through it fine unless i close my right eye and look on a computer screen. Its barely blurry but it feels super annoying. I dont have it all the time, just sometimes i blink and it feela blurry and then i blink and its fine again. Why is it doing this?