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There are two mechanisms of action how light affect humans discussed here: Amount of energy: shorter (blue) wavelengths are more energetic than lower (red), so it can be assumed that they damage photoreceptors more. Psychological: bluish light is associated with day by our biochemistry. Higher amounts of bluish light makes our brains more awake (e.g. ...


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The specific cause of astigmatism is unknown. It can be hereditary and is usually present from birth. It can decrease or increase over time. - American Optometric Association You might've had it since birth but without noticeable defect and has progressed rapidly enough to produce a defect in your vision during your early 20's. Other factors that would ...


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It is actually a pretty common myth that crossing your eyes too much or for too long will make them get stuck that way. Crossing your eyes does look very similar to strabismus which is an actual medical disorder where the eyes are crossed and it does need to be treated. Strabismus is not voluntary, compared to what you are talking about, which is voluntary. ...


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You can't give accurate values to the exact level of brightness needed for optimal reading. There are several factors that affect such things such as type of display, ambient light, type of work, program you are working with. If the brightness is reduced to a minimum, it forces the eyes to exert more strain which would damage the eye as excessive eye strain ...


3

Scintillating scotomas are essentially always caused by migraines (though I believe they have been reported from seizures as well). As such, the triggers for the scotomas are what triggers migraines. Migraine triggers are many and varied from person to person: certain foods (see https://www.webmd.com/migraines-headaches/migraine-trigger-foods#1), certain ...


3

What you appear to be describing is called Akinetopsia. (Greek: a for "without", kine for "to move" and opsia for "seeing") a neuropsychological disorder in which a patient cannot perceive motion in their visual field, despite being able to see stationary objects without issue [...] There are varying degrees of akinetopsia: from seeing motion as a ...


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No one likes CVS, and computer glasses are said to increase contrast and decrease glare to alleviate eye stress. If you are sure you will be using the computer in the future for prolonged periods and have considerable discomfort, it will be worth the investment for eye strain relief and ultimately less magnification.


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Brief description: LASEK and LASIK - cut a flap in the eye, use a laser to remove material underneath to reshape the lens and correct vision. LASIK has been around for a while, so there have been a lot of improvements and modifications, and there are a lot of variations of it. PRK - similar to LASIK, but no flap is cut. Instead a surface layer of cells is ...


2

In general, resolution varies with distance, but when expressed as angular resolution this takes distance into account; the minimum distance between two points that can be resolved will increase in proportion to distance for a given angle. The retina is the light sensitive part of the eye. It is packed with photoreceptor cells known as rods (more sensitive ...


2

I don't have any information about whether the Benq monitor in particular will effectively reduce blue light. But to your question... "Is it helpful?" This article is fairly well referenced, and includes an interview with Dr Wunsch, a German light therapist. In summary, it seems long exposure to blue light from artificial sources is indeed a bad for you ...


2

You might try the Consumer Reports online tool that allows you to select and compare hospitals, evaluated for safety and infection rates. Another useful site is the Hospital Safety Score, a public service of a non-profit organization, that lets you see an overall score, as well as more specific ratings regarding surgery, practices, safety, and clinicians.


2

There are a lot of factors involved. I'm no authoritative expert, but here are my personal observations about visual acuity fluctuations and optical knowledge, since getting LASEK (PRK) 6 years ago. inflammation - My right eye is more likely to get inflammed, which will cause loss of acuity. Sleeping in an awkward position could cause this. DO NOT RUB YOUR ...


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I think it depends on the brightness of other light in the room. To reduce eye strain you should try to keep your screen at a similar light intensity compared to the rest of the light in the room. A particular study showed that eye strain was increased when watching a bright screen in a dark room. "The result of all this testing and observation was that ...


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Dysmetria is a possibility. (Specifically Ocular Dysmetria) It is a type of ataxia characterised: is a lack of coordination of movement typified by the undershoot or overshoot of intended position It can occur in the major skeletal muscles and the eyes. Ocular Dysmetria: During eye movements hypometric and hypermetric saccades will occur [...] Saccades ...


1

To first establish a baseline: Reading is great for your brain, your mind, your intellect. But it can be bad for everything else. You sit, you concentrate, you stress your eyes. It is such a common causal connection that the NHS simplifies the analysis of causes for myopia down to genes and: Short-sightedness (myopia) usually occurs when the eyes grow ...


1

I've changed eyeglass prescriptions in the past, which is equivalent to what you're doing. Your eyes are no longer currently accustomed to having that kind of lens in front of them, so it feels the same way it did when you put glasses on for the first time. I would guess that the -2.5 power is the lens which makes a more significant correction to the lens ...


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According to eye care providers, computer glasses designed for digital screens which can help alleviate many of the factors which cause eye strain symptoms, although do not completely prevent it. For example they may help the eye to adjust to intermediate-distance objects such as computer screens. There are some with an antireflective coating which may help ...


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