Regular eye exams are essential for maintaining good vision and overall eye health. Whether it’s your first time visiting an eye doctor or you’re due for your annual check-up, understanding what happens during an eye exam can help you feel more prepared and at ease. In this blog, we’ll walk you through the typical steps of an eye exam and explain what each part involves.

1. Patient History and Initial Discussion

Before the examination begins, the eye doctor or an assistant will ask you about your medical history, including any current medications, past eye conditions, or vision problems. They may also inquire about your family’s eye health history, as certain conditions can be hereditary. This discussion helps the doctor understand any potential issues that may need special attention during the exam.

2. Visual Acuity Test

The visual acuity test measures how clearly you can see. You’ll be asked to read letters from an eye chart, usually from a distance of 20 feet, covering one eye at a time. This test determines your ability to see clearly at various distances and helps assess whether you need prescription lenses.

3. Refraction Test

If the visual acuity test suggests you may need corrective lenses, the next step is a refraction test. You’ll look through a device called a phoropter and be asked to compare different lens options (“Which is better, lens 1 or lens 2?”). This process helps the doctor determine your exact prescription for glasses or contact lenses by identifying any refractive errors, such as myopia (nearsightedness), hyperopia (farsightedness), or astigmatism.

4. Eye Movement and Coordination Test

The eye movement test checks how well your eyes work together. The doctor may ask you to follow a moving object, like a pen or light, with your eyes to assess the muscles that control eye movement. They may also check for binocular vision issues, which could affect depth perception and coordination.

5. Pupil Response and Light Reaction

The doctor will examine how your pupils respond to light by shining a small flashlight into each eye. This test assesses the health of your optic nerve and brain, as your pupils’ reaction can indicate potential neurological issues.

6. Peripheral Vision Test

Your peripheral vision, or side vision, is crucial for overall visual awareness. The doctor may conduct a visual field test, asking you to focus on a central point while identifying objects or lights appearing at the edges of your field of vision. This test helps detect any blind spots or issues with peripheral vision.

7. Slit-Lamp Examination

The slit-lamp exam allows the doctor to examine the structures of your eye under magnification, including the cornea, iris, lens, and retina. The doctor uses a special microscope with a bright light to look for signs of eye conditions such as cataracts, glaucoma, or macular degeneration.

8. Intraocular Pressure Test (Tonometry)

To screen for glaucoma, the doctor measures the pressure inside your eyes using a tonometer. This test is often performed with a puff of air (non-contact tonometry) or a device that gently touches the surface of the eye after applying numbing drops. High intraocular pressure can indicate a risk of glaucoma, which can lead to vision loss if untreated.

9. Retinal Examination

The retinal exam, also known as ophthalmoscopy, involves examining the back of your eye, including the retina, optic nerve, and blood vessels. The doctor may use an ophthalmoscope or perform a dilated eye exam, where special drops are used to widen your pupils, allowing a better view of the retinal structures. This test is crucial for detecting retinal diseases, diabetic eye disease, and other serious conditions.

10. Discussion and Recommendations

After all the tests are completed, the doctor will discuss the results with you. If a vision problem or eye condition is detected, they will explain the diagnosis and recommend treatment options, which may include glasses, contact lenses, medications, or further specialist evaluations. You’ll also receive advice on how to maintain good eye health and when to schedule your next exam.

Conclusion

Eye exams are a comprehensive evaluation of your vision and eye health, designed to detect potential issues early and ensure your eyes remain in top condition. Regular eye exams are key to preserving your vision and preventing eye-related problems. By understanding what to expect during an eye exam, you can approach your appointment with confidence and take an active role in maintaining your eye health.

During an eye examination, you might have heard the term “refraction” thrown around, but what exactly does it entail? Let’s delve into the intricacies of refraction and understand its role in assessing your vision.

Understanding Refraction

Refraction is the process by which light bends as it passes through the eye’s cornea and lens, ultimately focusing onto the retina at the back of the eye. This bending of light is crucial for producing clear and sharp images. However, when the eye’s refractive components are misaligned, vision can become blurred or distorted.

The Refractive Errors

Several common refractive errors can affect vision:

1. Myopia (Nearsightedness): In myopia, distant objects appear blurry while close objects remain clear. This occurs when the eye is too long or the cornea is too curved, causing light to focus in front of the retina rather than directly on it.
2. Hyperopia (Farsightedness): With hyperopia, close objects may appear blurry, while distant objects remain clearer. This occurs when the eye is too short or the cornea is too flat, causing light to focus behind the retina.
3. Astigmatism: Astigmatism results from an irregularly shaped cornea or lens, causing light to focus unevenly on the retina. This can lead to distorted or blurred vision at all distances.
4. Presbyopia: As we age, the lens of the eye loses its flexibility, making it difficult to focus on close objects. This age-related condition affects near vision and typically becomes noticeable around middle age.

The Refraction Test

During an eye exam, the optometrist or ophthalmologist performs a refraction test to determine the appropriate prescription for glasses or contact lenses. This test involves the following steps:

1. Phoropter: You’ll be asked to look through a phoropter, a device containing various lenses. The practitioner will alternate between different lenses while asking you to identify which ones provide the clearest vision.
2. Visual Acuity: The practitioner may also use a Snellen chart to measure your visual acuity, assessing how well you can see letters or symbols at various distances.
3. Subjective Refraction: Based on your responses and visual acuity, the practitioner determines the optimal lens prescription to correct your refractive error.

Importance of Refraction

Refraction is a crucial aspect of comprehensive eye exams as it allows practitioners to diagnose and correct refractive errors, thereby improving your visual clarity and comfort. By precisely determining your prescription, you can enjoy clearer vision and better overall eye health.

Conclusion

Refraction plays a vital role in assessing and correcting refractive errors during an eye exam. By understanding this process and its significance, you can actively participate in optimizing your vision and maintaining your eye health. Remember, regular eye exams are essential for detecting and addressing any changes in your vision, ensuring that you continue to see the world with clarity and precision.

Millions of people need to wear some sort of corrective lenses due to vision problems. It’s nothing to be ashamed of. If you’re noticing signs you need glasses, such as things becoming blurry, or if you’re having trouble seeing, there’s no need to keep suffering. Just pay your eye doctor a visit.

These are just a few of the possible signs you need glasses.

Your Eyes are More Tired Than Normal, or You Have Headaches

One of the most common signs you need glasses is feeling eye strain, or getting a headache after you read or work on your computer. There are a lot of reasons why your eyes may be strained. For one thing, we blink less when we stare at screens, be they computers, phones, or TVs. Other possibilities include allergies, an illness, or simply not getting enough sleep. But if your eyes get tired on a regular basis, that’s an indication something needs to be done about your vision.

Likewise, headaches can be caused by many things, but they are often linked to eye strain. The reason is that your eyes are working harder than normal to focus correctly. See an eye doctor to get things checked out. You might find that addressing your vision problem could help your headaches go away.

Everything Looks Blurry

Blurred vision is another telltale symptom of a vision problem. This is one of the surest signs you need glasses.

Some people can see objects at a distance, but their close-up vision is blurry. This is known as farsightedness, or hyperopia.

Others are just the opposite. They can see up close fine, but distant objects are blurred. This condition is known as nearsightedness, or myopia.

It’s possible that you’ve been dealing with blurriness for a while now, and have gotten so used to it, you haven’t realized it’s a problem. An eye exam will reveal whether you’re nearsighted, farsighted, or possibly even both.

You’re Constantly Rubbing Your Eyes

This is often another indication that your eyes are strained or fatigued. However, there could be another cause of your eye rubbing, such as allergies, or even pink eye (also known as conjunctivitis). See your doctor to determine the exact cause of your eye rubbing.

You Have to Hold a Book at Arm’s Length

If you have trouble reading when in your normal reading position, and have to extend your arms to read more clearly, you might have a condition called presbyopia. This typically affects people as they age (usually beginning in their 40s). Presbyopia occurs when the lens of your eye isn’t as flexible as it used to be, making it difficult to focus on close-up objects.

Another sign you need glasses is you easily lose your place when you’re reading. This is typically due to strabismus, a condition that involves misalignment of the eyes.

Closing One Eye to Watch TV

This is yet another of the surest signs you need glasses. Closing or covering an eye is one of the signs of astigmatism. Astigmatism occurs when the curvature of your eye isn’t what it should be. Either the curves of your cornea (the front portion of the eye) or your lens are mismatched in some way, which leads to blurry vision. Thankfully, this condition can be easily corrected with glasses.

Trouble Seeing at Night

A lot of people have issues when driving at night. If you’re one of them, you need to get to an eye doctor as soon as you can. Otherwise, you’ll not only put yourself in danger, you’ll also be a danger to other people on the road. If you find it hard to drive after sundown due to oncoming headlights, you might want to consider glasses with an anti-glare coating (you’ll learn more about choosing the right types of lenses for your glasses below).

A more severe condition, known as nyctalopia, or night blindness, makes it almost impossible to see in low-light conditions. Cataracts and myopia are two additional factors that often contribute to difficulty seeing at night.

Squinting

If you have to squint in order to read a book, watch TV, or see your computer screen, that’s another one of the easy signs you need glasses. Squinting helps reduce the amount of light entering your eye. This reduces the size of the image you’re trying to see, and helps bring it into better focus. Repeated squinting can mean you’re either farsighted or nearsighted.

Choosing the Right Glasses for You

So, you’ve had an eye exam, and your eye doctor says you need glasses. What’s next? You want to choose the right ones. And once again, your ophthalmologist can help you make the right choice.

First of all, you’ll want to make sure you have the right kinds of lenses for your particular situation. If, for example, you’re having trouble seeing your computer screen, you have a hard time reading, and your distance vision is blurry, you might want to consider progressive lenses. These are also known as no-line bifocals. They help with your distance vision, as well as your intermediate and close-up vision. The lenses look like regular glasses.

If you just have trouble seeing objects at a distance, then you’ll need single-vision lenses. If your problem is seeing close-up, you might only need reading glasses.

Lenses also come with a variety of coatings to choose from. One type is known as a polycarbonate lens. This is a type of lens that is lighter and more durable than a regular plastic lens. It’s a good choice for children and those who wear glasses when they work or play sports. Trivex lenses are even lighter and stronger than polycarbonate.

Polarized lenses are good for people who spend a lot of time outdoors. They not only reduce the amount of glare, they also help reduce the amount of ultraviolet (UV) rays that get into the eye. Polarized coatings are also good for people who look at a computer screen for several hours each day.

You’ll also have a lot of frames from which to choose. Your optician can help you pick the right frame for the shape of your face.

The Last Word

There’s absolutely nothing wrong with needing eyeglasses. Millions of people wear them, and the feeling you’ll get when you first put them on, and you can see clearly, is fantastic. There are many stylish, durable frames to choose from, and many different types of lenses for your particular vision needs. If you suspect your vision is changing, make an eye exam appointment.

Sources:

1. Refractive Errors
2. Myopia (Nearsightedness)
3. Pink Eye: Usually Mild and Easy to Treat
4. Presbyopia: What causes it and how to treat it

Progressive addition lenses can be notoriously difficult to successfully dispense, but there are several techniques that can be used to ensure patients are left satisfied.

How come some people love their progressive addition lenses (PALs) and others just can’t quite get used to them?

The answer is often in the prescription.

It’s important to know that lenses are not prescribed to magnify objects, but purely so that the object we are looking at is focused onto the retina. Magnification (or minification in the case of minus lenses), is a direct result of prescription power and actually an unwanted by-product of lens power.

When a PAL wearer looks down to read, they only have a small area in which to view their reading matter and so for plus lens wearers (hyperopes), the reading material they are looking at is actually magnified; they see less of the page in their limited reading zone and the higher the add power, the worse this becomes.

Often we find that some presbyopes do not appreciate their new freeform design lenses and ask why “these new and more expensive lenses are not as good as my old lenses?”

What happens, is that the wearer’s prescription is governing where and how the wearer needs to look to read. There is also prismatic effect at near point, which complicates what they can see and, more to the point, what they cannot see.

Plus lenses will create some base out prism on convergence. The image is displaced towards the apex of the prism, further complicating the reading image by necessitating slightly more convergence.

Minus prescription wearers (myopes) on the other hand, experience the opposite and generally will see a wider area through the reading zone because their prescription actually minifies the image, and they can see a lot more through their reading zone. The prismatic effect of the minus prescription will be base in (or less base out, considering the add power), which also works to benefit these short-sighted PAL wearers by lessening the amount of convergence required for reading.

Understanding this should help to realise that all wearers’ prescriptions are different and so too will be their level of acceptance of their new progressive addition lenses.

Remember, for two presbyopes with the same add (say +2.00), one a hyperope with a +2.00 distance Rx and one a myope with a -2.00 distance Rx, the power at near point will be very different – +4.00D and Plano respectively. So it is common for low add myopes to not like their PALs and prefer to remove their glasses to read.

Lens positioning

But that’s not all, when the patient undergoes a refraction, the prescription is determined by the optometrist who uses either a phoroptor head or a trial frame. Both of which use optically precise, 38mm flat form, glass bi-convex or bi-concave lenses positioned perpendicularly in front of the patient’s eyes – the perfect script in the circumstances and the perfect starting point for lens recommendation.

You see, there is another important difference to be considered here, the difference of how each individual lens is positioned on each diverse wearer.

The final position of the lenses in the spectacles will be different to the lenses used to determine the prescription in the first place. To experience the effects of this, take a powered spherical stock lens and focus it on a lensmeter, then tilt the lens and watch the focus change.

Most frames will have some pantoscopic angle

What happens with this small experiment is you have created astigmatic error on a spherical lens by tilting it, which replicates what happens when the spectacle frame is positioned on the wearers face at a different angle to the phoropter head or trial frame. Of course, there will be varying degrees of astigmatic error depending on power and how the frame sits on each individual face.

However, lens laboratories can optimise freeform lenses accordingly – to do this they use default measurements if you do not provide them. But by providing the actual position of wear measurements, your lab can personalise the lenses for your patients with lenses that place the true power in the as worn position of the frame and provide a better visual experience for the wearer, and better adaptation rates.

Consult Your Eye Care Professional

Every person is unique—and so are their eyes! Your eye care professional will assess your habits, your daily activities, and your working environment to better understand how you will be using your lenses. Your posture and face shape are also important considerations. Eye care professionals need this information so they can recommend a product that will suit your needs.

Your prescription optician is trained to advise you on the wide range of products available from the world’s largest manufacturers of corrective lenses. There are lots of progressive lenses to choose from—there’s an option to fit each person’s viewing area. Your eye care professional can recommend the product that will best suit your lifestyle. After you clearly explain your daily activities, they’ll be able to offer you a lens that’s well suited to your needs and that will be as comfortable as possible. The goal is for your lenses to give you the most natural vision possible at all working distances.

Multiple measurements are required to adjust progressive lenses. In addition to taking your prescription into account, your eye care professional will look at how the frame fits your face and other factors to make sure your progressive lenses are customized just for you.

Wear Your Glasses

This might seem obvious, but it bears repeating. It’s normal not to want to wear your glasses if you’re experiencing visual discomfort, but wearing your new glasses every day from morning to night (if possible) will help you adapt quicker. The sooner you start wearing them, the more natural your vision will become at all distances and the sooner you can enjoy all the benefits of your new lenses! For the same reason, we recommend you don’t alternate between your new and old glasses for the first few days.

Don’t Delay the Inevitable

It’s best to start wearing progressive lenses as soon as you begin to experience presbyopia, while it’s not as important to correct your near-range vision. That way it’s easier to adapt to the lenses because the overlapping areas are smaller and less bothersome. Plus, your eye lens is still flexible enough to easily accommodate changes in distance. Since presbyopia is a visual disorder that evolves over time, adapting when you only need to make small corrections will make it easier to manage further adjustments later.

Move Your Head, Not Your Eyes

Depending on the product you select, your eye care professional may take measurements so your lenses can be manufactured based on how much you move your head relative to your eye when looking at something. In general when you’re looking at something far away, you’ll need to use the upper part of your glasses. When looking at something nearby, tilt your head slightly to look through the bottom of the lens. Position what you’re looking at right in front of you. This will help you optimize your viewing areas so you don’t get annoyed by the blurry areas that may appear on the periphery.

When you want to look in a specific direction, turn your whole head instead of just moving your eyes. You might have to turn your head more than you’re used to, to avoid blurry areas on your glasses. As you’re getting used to the lenses, try not to take stairs too quickly or step down off sidewalks in a hurry because you may have trouble seeing the steps! With time, seeing with progressive lenses will become second nature.

Sources:

5 Ways to Quickly Adapt to Wearing Progressive Lenses Published by Opto-Réseau on October 10, 2018

Did you know that an eye exam can be as effective as a physical in determining your health? Unfortunately, many Americans put off going to the eye doctor if they feel like their vision has not changed. Comprehensive eye exams are important for many reasons. Your eyesight may change very gradually over time, and you may not even know that you need a stronger prescription. Your eye doctor will also perform several tests during the eye examination that will rule out eye disorders such as glaucoma, cataracts or retinal problems.

Hosts of the hit TV show ‘The Doctors’ share surprising information about what your eye doctor might discover about your blood pressure, cancer and more.

The importance of regular eye exams

Blood pressure? Check. Weight? Check. Pee in a cup? Check. Seeing an eye doctor regularly?

Along with eye-related concerns, eye doctors may even be able to detect other health issues during a comprehensive eye exam. In fact, you may even find yourself leaving the eye doctor with a referral to another specialist because of a specific test that your ophthalmologist performed during your comprehensive eye exam. Here are just a few health issues that may be discovered during an eye exam:

Sources:

1. 6 Shocking Diseases That Eye Doctors Find First, Apr. 30, 2019
2. 7 Health Problems Eye Exams Can Detect