8

The so-called halos are typical for spikes of intraocular pressure rise in high-tension glaucoma (or ocular hypertension) forms, most often in melanin-dispersion syndrome (MDS, or pigment-dispersion syndrome) which is a trigger for glaucoma in myopes and often begins in early adulthood. The halos appear when a spike in intraocular pressure leads to ...


7

In general any cellular material within the vitreous may cause eye floaters, for example red blood cells as a result of hemorrhage and white blood cells as a result of infection or inflammation. So cause of it should be always determine by a doctor (ophthalmologist). Abnormal eye floaters are associated with bleeding in the vitreous from diabetic retinopathy,...


6

...it seems possible that with aging, as the vitreous becomes less distinct from the aqueous, some of the vitreous might end up draining through the same duct that the aqueous drains through, in an eye with no lens to serve as a barrier. Is that the case? In a normal (i.e. lens intact) eye, that would, I think, be a problem. The aqueous humor is a self-...


5

[S]ometimes they become more prominent again, usually for a few minutes at a time. Is this a difference in perception (something is causing me to notice them more) or a difference in placement (they've moved into the center of my field of vision for some reason and are thus harder to ignore)? Floaters do move, but not very much. Mostly they "sway and settle"...


4

Post-operative complications include the following: Visually significant wrinkles or striae in the flap (1%) Dislocated flap (early postoperative period) Infection (early postoperative period; very rare; < 0.02%) Diffuse intralamellar keratitis (< 0.1%) Epithelial ingrowth (early to late postoperative; 1-2%) Under/overcorrection (see results) Ectasia (...


4

According to my eye doctor, this much distortion is not normal. He checked the strength of my glasses and they were not made according to the prescription: the OS astigmatism correction was -0.50 rather than the written -0.25. Getting the glasses remade now.


4

Collagens are a family of fibrous proteins (as opposed to globular proteins like enzymes and hormones and membrane proteins like cell receptors) that form part of connective tissue. Thus they are important in forming the structure of many organs and tissues. Connective tissue is one of the four main types of animal tissue. The others are epithelial tissue, ...


4

Questions 1-2 Unfortunately, the answer to these depend on the exact brand and line of contacts used. For example, here is a long list of silicon hydrogel lenses, and how long they last. Here is another list of materials used to make contact lenses (including many of the silicon hydrogel type). Some of those are dailies, but some can be worn day and night , ...


3

Aspirin has a "blood thinning" effect; it inhibits platelet aggregation. Therefore, it gives a higher risk of bleeding in the period surrounding the surgery. I have not found a review about specifically cataract surgery, but this large trial (>10000 patients) shows that in noncardiac surgeries, aspirin gives an increased risk of major bleeding.


3

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 ...


3

Is the blue light emitted by computer monitors deleterious for the human eyes? No. UV from the Sun (or other strong UV sources, such as germicidal bulbs) is harmful. Blue light from a computer monitor or cellphone contains insufficient ultraviolet light to harm the eyes, the problem is that blue light causes the suppression of melatonin which affects the ...


3

A toric lens is the type that is used to treat astigmatism, not an aspheric lens. An aspheric lens is primarily designed to correct for the spherical aberration of the contact lens itself, the spherical aberration of the combination of the cornea and lens of the eye, or both. A toric lens is shaped like a slice of the side of a torus. It has a different ...


2

The source does not explicitly tell the long-term story, but I presume that since those particles are actual matter inside your eye (due to the ageing process as your body slowly disseminates), then they would not dissolve with the time, nor leave the eye-ball. Logically, they might stick to the wall of an eye-ball or something similar. Nor is it likely ...


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

The vision can be sharp when the light is focused exactly on the retina, not in front or behind it. This is enabled by the constant eye bulb length and the ability of the lens to accommodate to near or far objects. Three cranial nerves that innervate the extraocular muscles and thus the shape of the eye bulb include the oculomotor nerve (n. III), trochlear ...


1

Disclaimer: I have no formal medical or vision science training. Please point out any factual errors. My test is based on the idea that Glaucoma is indicated by pressure on optic nerve, which one may not even be aware of but slowly destroys the nerve (which is actually a bundle of nerves, similar to a huge communications cable) from the outside of the cable ...


1

Risks of LASIK (Laser-Assisted in situ Keratomileusis) can include: Vision loss due to infection, The researchers calculated the risk of significant vision loss consequence of LASIK surgery to be closer to 1-in-10,000 cases. Higher-order aberrations, These aberrations include 'starbursts', 'ghosting', 'halos' and others. Dry eyes, Although it is ...


1

Ps:myopia is condition your cousin is having most likely. children's bodies grow, so do the eyes, which may cause a gradual increase in myopia. And just as bodily growth can be in uneven spurts, the changes in myopia may be similarly uneven. During adolescence, the change can be rather rapid and require a new, thicker eyeglass correction more than once a ...


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