Have you ever had an eye exam? Some people may think that this is only necessary for people who wear glasses. But in fact, this test is very important for everyone to know exactly how our vision and health are. If you have certain chronic conditions, you may need to have your eyes checked more often.
What is an eye exam? Simply put...
Simply put, an eye exam is a procedure where an eye health professional checks your vision, hearing, and eye health. This is a painless test. It can detect even small changes in your eyes early. This can make it easier to treat them before they become a bigger problem.
Who does these eye tests?
It's good to know that not all eye exams are the same. Some are done for specific purposes, while others are general exams. Also, there are several specialists who perform these exams:
- Ophthalmologists: These are people who have a medical degree (`MD - Medical Doctor` or `DO - Doctor of Osteopathic Medicine`), which means that in addition to four years of medical school education, they have received another four years of special training (residency) in eye diseases. Some do further training (`fellowships`) in even more specialized areas. They are the ones who often perform `eye surgeries`.
- Optometrists: They study optometry for four years and earn a Doctor of Optometry (OD) degree. Some also do a year of residency training. They can diagnose and treat all types of eye diseases. However, they cannot perform surgery.
- Opticians: These are also eye care professionals, but they don't examine your eyes. They help you choose the right glasses for you, measure your head and eyes, and adjust your glasses. There are many things they do that contribute to your eye exam.
Just think, it's like going to a regular doctor when you have a fever, but when you have an eye problem, you need to go to these specialists.
What are these types of eye tests?
One way to classify eye tests is by the purpose for which you are getting them.
- Routine/General exams: These are done for the eyes, just like an annual `checkup` for the body. These are usually done for people who do not have any eye disease or who only need glasses to correct their vision.
- Follow-up exam: This is a somewhat specialized exam. This may be done to check the condition after a previous eye accident or surgery. Also, people with chronic diseases such as diabetes or macular degeneration often need follow-up exams.
- Medical/Emergency exams: These are done when there is a suspicion that there is a problem with your vision, especially in an emergency. For example, eye injuries, sudden vision loss, head injuries, etc.
What is looked for in an eye exam? What components are included?
There are about 13 main parts to a complete, or ``comprehensive``, eye exam. Let's take a look at what they are.
First, there are seven parts that look at how your eyes work and how they appear from the outside:
1. Visual acuity: This measures how well you can see. This is often measured using a Snellen chart . Have you ever seen a chart on the wall with a large letter at the top and smaller letters as you go down? That's what it is.
2. Visual fields: This measures how well each eye can see each part of your field of vision. This can help determine if there are any blind spots.
3. Movement and alignment: This checks to see if your eyes are aligned properly and can move in all directions without moving your head. The doctor will examine one eye and both eyes together.
4. Conjunctiva: This is the thin, clear membrane that covers the white part of your eye (the `sclera`) and the inside of your eyelid. The doctor will examine this.
5. Surrounding outer tissue (Ocular adnexa): This includes the eyeball and other parts of your eye and face. The doctor will check to see if these parts, such as your eyelids, tear ducts, and the lymph nodes in front of your ears, are working properly.
6. Pupil and iris: The pupil is the black, round part in the middle of your eye. The iris is the ring around it that gives your eyes their color. The doctor will look at how the pupil responds to light ('pupillary reflexes').
7. Intraocular pressure: This measures the pressure of the fluid inside your eye by blowing a puff of air into it. If the pressure is high, it could be a sign of a condition like glaucoma.
Next, the eye specialist will examine five parts of the eye using a special instrument called a slit lamp . This has a light and a magnifying lens. This allows you to see inside the eye very well. Sometimes this test can be done with or without medication to dilate your pupils.
8. Cornea: This is like the front of your eye. Your doctor can check to see if it is in good condition by looking at it with a slit lamp.
9. Anterior chamber: This chamber, located at the front of the eye, contains the aqueous humor , iris, and lens. These can be seen more clearly and up close with a slit lamp. It can detect changes in conditions such as angle-closure glaucoma . This is when the pressure in the aqueous humor increases, preventing the fluid from moving or draining properly.
10. Lens: The doctor will check the clarity and structure of the lens.
11. Optic nerve: The doctor will look at the optic disc (where the optic nerve connects to the eyeball) and the optic cup (the bowl-shaped area in the middle of the disc) . They will also look at the cup-to-disk ratio. If this ratio is low, there may be a risk of developing conditions such as ischemic optic neuropathy .
12. Retina: The slit lamp allows the doctor to take a closer look at this light-sensitive layer at the back of your eye. He or she will check for wrinkles, discoloration, or damage.
Why do you ask things like where you are and what time it is?
13. Orientation to time, place and person: This 13th section looks at how well your brain is working. This is not part of every eye exam, but it can be very important in some cases. In many cases, the doctor can assess this after talking to you.
- Time orientation: Do you know what time it is and what day it is?
- Orientation to place: Do you know where you are and what you are doing?
- Orientation about the person: Do you know your name and details about yourself?
While these questions may seem odd for an eye exam, sometimes it's essential to ask them, because sometimes eye symptoms can also provide clues about brain problems.
Do you need to prepare before going for an eye exam?
Usually, there is no need for much preparation for an annual check-up or a follow-up. It's just like going for an annual check-up, you can go in, get the check-up done, and then go back to your daily activities.
But, there is one thing you should do. Bring a complete list of all the medications, vitamins, and supplements you take. It is important for your eye specialist to know these as part of the exam, even if you are taking them for reasons unrelated to your eyes. Also, bring your current glasses, contact lenses, and any previous prescriptions.
What to expect during the test?
During an eye exam, your eye doctor will ask you questions about your vision, any changes or problems you've noticed recently, and any recent medical events or changes in your life. Then, they will perform several of the tests listed above. They may also recommend other tests depending on your condition. Your eye doctor will tell you more about these additional tests.
Dilating your pupils makes it easier for the eye specialist to see inside your eye. The doctor uses medication to temporarily relax the muscles in your pupil. This relaxes it and opens it. They can then look inside your eye and see if there are any problems that might not be visible otherwise.
If you have a refractive error and need glasses, your eye specialist will measure the error in each of your eyes. They can then write a prescription for glasses that will correct the error. If you need to wear contact lenses, they can also take special measurements of your eyeballs to make sure they fit.
What happens after the test?
After a routine eye exam, your eye doctor will explain what they found and how it affects you. If they find that you need glasses, they will give you a paper or digital copy of your prescription. By law, they must give you a copy, even if you don't want it. In some countries, the law even requires that your pupillary distance, which is the distance between your black eyes when you buy glasses online, be included in your prescription. While most places don't require that measurement, some doctors will provide it if you ask.
Important: If your cornea is dilated, you may have difficulty seeing close objects – such as your phone, computer screen, or books – clearly for a while after the test. Lights, daylight, and even the light from device screens can cause discomfort and pain.
You can bring a pair of sunglasses and put them on after the exam. That will help a little. Sometimes the doctor's office will give you temporary shades or covers to put over your glasses. However, some people may not be able to see well enough to drive after dilating their eyes, so it's best to have someone to go with you or to accompany you.
Are there any risks or side effects from an eye exam?
The only part of an eye exam that can cause a risk or side effect is the medication that is used to enlarge your black eye. You may have side effects if you are allergic to it. Symptoms vary depending on the medication, but they are rare and usually minor. If you have had a reaction to this medication before, tell your eye doctor. They may be able to recommend an alternative.
What are the results of an eye exam? What do they tell us?
Your eye specialist will tell you what they found, either during the exam or after it's over. They will recommend treatments and further tests. If you need glasses, they will also write a prescription for them.
When should I call my eye specialist?
Talk to your eye specialist as soon as you notice any changes in your vision, especially if they occur gradually over time. This could include difficulty reading small print or writing, decreased color vision, squinting, eye strain, or headaches at the end of the day.
A medical emergency is a sudden, unexpected loss of vision, either in one or both eyes, or in part or all of it. Some of the conditions that cause it can lead to permanent vision loss. Some of them can be life-threatening. Sudden vision loss can be:
- Blurred or fading vision.
- Darkness.
- A feeling of a black curtain covering part or all of the vision in one or both eyes.
- Feeling as if bright lights or glare are partially or completely blocking vision.
Some conditions, such as migraines, can cause temporary vision loss. If you have a condition that can cause temporary vision loss, talk to your eye specialist or doctor. They can tell you what to do if you lose your vision and how to know if you need emergency treatment.
How often should I have an eye exam?
Most people should have a comprehensive eye exam every year or two . Even if you have 20/20 vision , it's a good idea to get an eye exam. Just as an annual checkup can catch diseases that don't cause symptoms, an eye exam can find health and eye problems that you can't see or feel.
People who are at higher risk of developing eye diseases or vision problems may need to have their eyes checked more often. You may also need to have your eyes checked more often, such as:
- If you are over 60 years old.
- If you are of black or Hispanic descent.
- If you are overweight or obese (that is, if your BMI - Body Mass Index is 30 or higher).
- If you have a health condition, such as diabetes , that can cause eye problems or vision loss.
- If anyone in your family has a history of eye disease.
- If you wear glasses or contact lenses.
- If you have had previous eye surgery, an eye injury, or previous eye damage from diseases such as strokes .
The most important thing to remember (Take-Home Message)
An eye exam is something you can do regularly, like an annual checkup for your eyes. Eye exams can also help detect early signs of eye and brain disease.
You may think you don't need regular eye exams (especially if you don't wear glasses or contact lenses), but it's still a good idea to get them. With a checkup, you can find problems before you have symptoms. Then, you can see better and stay healthy, instead of getting worse. So, don't forget to take care of your eyes!
` Eye exam, eye health, vision, ophthalmologist, optometrist, glaucoma, glasses
💬 අදහස් (0)
තවමත් කිසිදු අදහසක් පළ කර නොමැත. ඔබේ අදහස පළමු වරට මෙහි එක් කරන්න.
ඔබේ අදහස එක් කරන්න