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Eyes
The eyes are organs. They detect light, regulate the light through a diaphragm, focuses it through adjustable lenses and converts them into electo-chemical impulses in our neurons by photoreceptor cells called rods and cones. The image is converted into a set of electrical signals that are transmitted to the brain via neural pathways that connect the eye to the optic nerve and visual cortex of the brain. In short, eyes are very complex optical systems that convert light to distinguish objects and movement around us.
11,082 Questions
Hi
i am not a doctor but i had made this surgery in my both eyes in 2010
well , my right eye is not bad now but the left one still has a large astigmatism
The cornea transplant is taking your old cornea which contain a certain disease and replace it with a good one
It may take a whole year to become a normal person but it most cases the healing time is based on your healthy and age .I am 26 years old from Egypt
I hope that this will help you
Good luck
What are the ingredients in clear eyes eye drops?
The ingredients in Clear Eyes eye drops include naphazoline hydrochloride and gylcerin. You can get more information about the ingredients in Clear Eyes eye drops online at the Livestrong website.
Does the pupil dilate when focusing for near vision?
Yes, the pupil constricts when focusing for near vision due to the action of the ciliary muscles, which causes the lens to thicken in order to focus on nearby objects.
What vision is a narrow field of vision?
A narrow field of vision typically refers to having limited peripheral vision, where objects outside the direct line of sight may be difficult to see. It can be caused by various eye conditions such as glaucoma, cataracts, or retinitis pigmentosa, and may require medical attention to diagnose and manage effectively.
Can a green eye and blue eye parent have a brown eyed child?
Yes.
Brown eye gene = B
Blue eye gene = b
Each person has two copies of the eye color gene in their genome, one inherited from each parent. Now if both parents only carry the gene for brown eyes, BB and BB, then their child will receive one B from each parent, ending up as BB. The same works for blue eyes, if that's the only gene both parents carry, bb and bb. Each parents gives on b to the child, who ends up as bb.
If you have one parent who only has the gene for brown eyes, BB, and one parent who only has the gene for blue eyes, bb, then all the children will have brown eyes. Example: One parent gives a B, the other gives a b. Bb = brown eyes. Here's why: When you have two alleles (coding sequences) from genes that are at odds with each other, one version will override the the other. When dealing with eye color, B always dominates b. But these children now carry the b gene in them, and could pass it down to their own children. Some of them, depending on the other parent, could end up with blue eyes.
If one parent is Bb, and the other is bb, then each time they have a child, there is a 50% chance it will have blue eyes. Example: First parent is Bb, second parent is bb, then their children will end up as either Bb, bb, Bb, bb. If both parents carry the genes for brown eyes and blue eyes, then each time they have a child, there is a 25% chance it will have blue eyes. Example: First parent is Bb, second parent is Bb, then their children will end up as either BB, Bb, Bb, bb.
What causes a lump under the eyelid?
It is most likely a stye.
Sty OverviewA sty is an acute infection of the secretory glands of the eyelids.
This common infection results from blocked glands within the eyelid. When the gland is blocked, the oil produced by the gland occasionally backs up and extrudes through the wall of the gland, forming a lump (chalazion), which can be red, painful, and nodular. Frequently, bacteria can infect the blocked gland, causing increased inflammation, pain, and redness of the eye, and even redness of the surrounding eyelid and cheek tissue. The medical term for sty is hordeolum.
The lump can point externally (outward) or internally (inward). Frequently, the lump appears with a visible whitish or yellowish spot that looks much like a large pimple. Usually, one obvious area of swelling is apparent on one lid, but many styes can appear on one or both eyelids simultaneously.
The lump frequently goes away when the blockage of the gland opening is relieved. Furthermore, the infection goes away when the pus is drained from the sty.
Sty CausesStyes are usually caused by obstructed orifices (or openings) of the oil glands in the eyelid. Very frequently, they are infected by bacteria, most commonly Staphylococcus bacteria.
Seborrhea (excessive oily discharge from the glands) may increase the likelihood of developing one of these infections. Certain factors can contribute to the blockage of the glands:
- improper or incomplete removal of eye makeup;
- use of outdated or infected cosmetics;
- poor eyelid hygiene;
- inflammatory diseases of the eyelid, such as blepharitis, meibomitis, and rosacea;
- stress; and hormonal changes.
- A lump on the top or bottom eyelid
- Localized swelling of the eyelid
- Pain
- Redness
- Tenderness to touch
- Crusting of the eyelid margins
- Burning in the eye
- Droopiness of the eyelid
- Scratchy sensation on the eyeball
- Blurred vision
Sometimes, complications may occur from a seemingly innocent problem. Immediately contact your ophthalmologist (a medical doctor who specializes in eye care and surgery) if any of the following problems occur:
- The eye is swollen shut.
- Redness appears around the entire eye.
- You have any change or disturbance in your vision.
- Swelling lasts for more than three weeks.
- The sty or styes come back or bleed.
- Your eyelashes fall out.
- The sty is on the bottom eyelid, near the nose.
- The white part of the eye becomes red.
- Pus or thick discharge continues to drain from the eye.
- You have a fever higher than 100.5 F.
- You have excessive persistent tearing.
- You have persistent redness of the surface of the eye.
- You have significant pain.
- The sty recurs, especially if the sty does so in the same location as a previous sty.
- You have swelling of the lymph nodes in your neck.
- You experience double vision.
- Is the eyelid infected?
- Is the cornea involved?
- Is surgery required?
- How can I prevent a recurrence?
- What is the chance that the sty may be a type of skin cancer?
- Is the tear drainage system involved?
Most styes go away on their own in five to seven days.
- Apply warm compresses four to six times a day for about 15 minutes at a time to help the drainage. Keep your eyes closed.
- Gently scrub the eyelid with tap water or with a mild, nonirritating soap, or shampoo (such as baby shampoo). This may help with drainage. Close your eyes as you scrub so you do not injure your eyes.
- Do not squeeze or puncture the sty. A more serious infection may occur as a result.
- Discontinue the use of eye makeup as well as eye lotions and creams because they may be infected.
- Discontinue wearing your contact lensesbecause the sty may cause an infection to spread to your cornea with the continued use of your contact lenses.
Good hand and facial washing may prevent styes from forming or coming back.
Upon awakening, application of a warm washcloth to the eyelids for one to two minutes may be beneficial in decreasing the occurrence of styes by liquefying the contents of the oil glands of the eyelid and thereby preventing blockage.
All cosmetics and cosmetic tools should be kept clean and protected from the environment. Do not share makeup or eye cosmetic tools, such as eyelash curlers. Makeup should be thrown away when it becomes old or contaminated.
Some studies suggest oral flaxseedsupplementation may help prevent the occurrence of styes.
Do native algerians have blue eyes?
Blue eyes are rare among native Algerians, as the majority of the population has brown eyes due to genetic influences from Berber, Arab, and other North African populations. However, there is a small percentage of individuals with blue eyes, typically attributed to genetic diversity or intermarriage with other populations over time.
How do you install a nien made blind?
To install a nien-made blind, start by measuring the window frame for proper fit. Using a level, mark where the brackets will be placed for the blind. Attach the brackets securely to the frame and then simply snap the blind into place. Adjust as needed and enjoy your new window treatment!
How long do pinpoint pupils last with heroin?
your pupils can stay small through the whole time you are on heroin.
you feel the most intense part of heroin in the first four hours but after that heroin is still in your system and it still effects your pupils.
id say it depends on how much you have in your system, could last all night. your pupils could be small 8 hours after and slowly gain there normal size after more time
What is the vision and mission of Pantene?
Pantene's vision is to help people around the world embrace their unique beauty by providing hair care products that deliver healthy, beautiful hair. Their mission is to empower people to express themselves through their hair and feel confident in their own skin.
Why are the images seen by each eye slightly different?
As with any other parts of the human body that come in pairs, both your eyes (and their different parts, such as the lens) are not 100% symmetrical, as for their position in the skull, and this will have an effect on how light "hits" your retinas.
How are owl's eyes different to human eyes?
Owls have larger eyes relative to their head size, allowing for improved vision in low light conditions. They also have more rod cells in their retinas, enhancing their ability to see in the dark. Additionally, owls have tubular-shaped eyes, providing them with a wider field of binocular vision for improved depth perception.
What is role of FAS subsystem of vision plus in a transaction?
The FAS subsystem in Vision Plus is responsible for handling financial authorization requests during a transaction. It verifies the transaction details, performs risk assessments, and approves or declines the transaction based on predefined rules. This subsystem plays a crucial role in ensuring the security and integrity of the transaction process.
What does an eye of good land mean?
"An eye of good land" is a phrase that refers to a piece of land that is fertile, productive, and suitable for cultivation. It typically indicates land that is well-suited for farming or other agricultural purposes.
The fact is you can go search every where and ask any one but blinking your eyes while you sneeze is a natural body reaction. When you see a bright light you sneeze and your eyes close so that they can shut longer than when you blink so you won't hurt your eyes . As much as you try not to blink you cant because when you sneeze your entire body shuts down for that time so your eyes close as well.
Another reason why you naturally blink when you sneeze is that if you did not blink while sneezing, your eyes would pop out.
Acts of the Apostles, written decades after Paul's death, provides three parallel but different miraculous stories in which Jesus appeared to Paul on the road to Damascus. In each account there was a blinding light, which appeared only to Paul in the version at Acts 9:3-8 and probably at Acts 26.13-19, but appeared to both Paul and his men at Acts 22:6-11 (although only Paul was blinded). Paul alone heard a voice from heaven at Acts 22:6-11 and probably at Acts 26.13-19, but both Paul and his men heard the voice at Acts 9:3-8. Each of these stories says that the voice from heaven said it was Jesus, and from this one could believe that Paul did accept that it was really Jesus.
The three accounts of this event actually appear to have been based on the ancient play of Euripedes called the Bacchae. This alone would be enough to cast serious doubts on the explanation in Acts.
Paul himself provides very little information about how he came to believe that he was called to be the apostle to the gentiles. He never mentions any divine vision that led to his conversion nor of his being temporarily blinded; in fact his epistles seem to have ruled this out. In his Epistle to the Galatians, Paul said that after his conversion, he travelled to Arabia, and only then went to Damascus (bypassing Jerusalem), then Jerusalem, Syria and Cilicia, and, after a period of fourteen years, back to Jerusalem (Galatians 1:17-2:1). On this evidence, we could reasonably say that Jesus did not meet Paul on the road to Damascus, at least not at the time of his conversion, and Paul was certainly not required to go immediately to the nearest city (Damascus) because of blindness.
How many times does an adult blink their eyes in a minute?
the average amount of blinks per minute for a human eye is 25
It depends on the person and the situation. We need to blink a few times a minute, much less than we typically do. Blinking is more frequent when nervous.
How do you get rid of a pike on your eye?
Soak a chamomile tea bag in warm water (you can simply make a cup of chamomile tea) and wait till the tea bag cools down. Then place the tea bag on the eyes for ten minutes. You can repeat the procedure a few times in a day. Another option is soaking your eyes in a cup of cold or lukewarm chamomile tea.
Who examine eyes for vision problems and defects not an MD?
An optometrist is a healthcare professional who can examine eyes for vision problems and defects. They are not medical doctors, but they are trained to provide primary eye care, including prescribing glasses and contact lenses.
What is seeing prisms out of your eye a symptom of?
Seeing prisms out of your eye can be a symptom of a condition called ocular migraine. This visual disturbance includes seeing shimmering or flashing lights, zigzag lines, or geometric patterns in your field of vision. It is usually temporary and resolves on its own. If symptoms persist or worsen, it's important to consult with a healthcare professional for further evaluation.
The pupil is the hole in the centre of they eye. It allows light to pass through to the back of the eye. The light is sensed by special cells. Information is then sent to the brain where a visual image is formed.
It may be relevant to note that the light is flipped upside down when it travels to the back of the eye. The brain is able to sort the image so it is the right way up. The reason the brain can do this is becuase it has practice. Becuase of this babies probably see the whole world upside down for their first few weeks after birth. Also, if you stood on your head for a few weeks, you would start to see everything the right way up again... assuming the blood flow to your head didnt kill you first
