Eye Exams in Jacksonville FL

The Valuvision Comprehensive Eye Exam:

A complete eye exam involves a series of tests designed to evaluate your vision and check for eye diseases. Your doctor may use odd-looking instruments, aim bright lights directly at your eyes and request that you look through a seemingly endless array of lenses. Each test during an eye exam evaluates a different aspect of your vision so that the doctor can develop a complete picture of your ocular health and vision quality.

Why eye exams are done:

An eye exam is one of the best ways to protect your vision because it can detect eye problems at their earliest stage which is when they're most treatable. Regular eye exams give your eye care professional a chance to help you correct or adapt to vision changes and provide you with tips on caring for your eyes.

When to have an eye exam:

Children 5 years and younger: For children under 3, your pediatrician will likely look for the most common eye problems — lazy eye, crossed eyes or turned-out eyes. Depending on your child's willingness to cooperate, his or his first more comprehensive eye exam should be done between the ages of 3 and 5.

School-age children and adolescents: Have your child's vision checked before he or she enters kindergarten. If your child has no symptoms of vision problems and you don't have a family history of vision problems, have your child's vision rechecked every two years. If your child does have vision problems or a family history of vision problems, have your child's vision rechecked as advised by your eye doctor.

Adults: In general, if you're healthy and have no symptoms of vision problems, you should have your vision checked every two years between the ages of 20-40. Between ages 40 and 65, have your vision checked every year. After age 65, get your eyes checked every year or as directed by your medical professional. If you wear glasses, have a family history of eye disease or have a chronic disease — such as diabetes — that puts you at greater risk of eye disease, you need to have your eyes checked more frequently. You might also need more frequent eye exams to check for retinal problems if you were born prematurely or to monitor your eyes for glaucoma if you're of African-American heritage.

What to expect from your doctor

If you're seeing a new eye doctor, or if you're having your first eye exam, expect questions about your vision history. Your answers to these questions help your eye doctor understand your risk of eye disease and vision problems. Be prepared to give specific information, including:

• Are you having any eye problems now?
  
• Have you had any eye problems in the past?
  
• Were you born prematurely?
  
• Do you wear glasses or contacts now? If so, are you satisfied with them?
  
• What health problems have you had in recent years?
  
• Are you taking any medications?
  
• Do you have any allergies to medications, food or other substances?
  
• Has anyone in your family had eye problems, such as cataracts or glaucoma?
  
• Has anyone in your family had diabetes, high blood pressure, heart disease or any other health problems that can affect the whole body?

If you wear contact lenses, bring them to your appointment. Your eye doctor will want to make sure your prescription is the best one for you. Also be prepared to remove your contacts for certain exams. Tests that use orange dye (fluorescein) to temporarily color your eye may permanently dye your contact lenses, so take them out before those types of tests.

The Eye Examination process:

An eye exam usually involves these steps:

• First, your doctor asks about your medical history and any vision problems you might be experiencing.
• Next, your eye doctor checks your eyes using a light to ensure the exterior parts of your eyes are healthy.
  
• Finally, your doctor measures your visual acuity, assesses your need for glasses and examines your eyes for signs of disease.

Part of the examination, such as taking your medical history and the initial eye test, may be performed by a technician who assists your doctor.

Several different tests may be performed during the eye exam. The tests are designed to check your vision and to examine the appearance and function of all parts of your eyes.

Eye muscle test

This test examines the muscles that control eye movement, looking for weakness or poor control. Your eye doctor looks at your eyes as you move them in six specific directions and as you visually track a moving object, such as a pen or a light.

Visual acuity test

This test measures how clearly you can see from a distance. Your doctor will ask you to identify different letters of the alphabet printed on a chart (Snellen chart) positioned usually 20 feet away. The lines of type get smaller as you move down the chart. You cover one eye and read aloud, then cover the other eye and read aloud.

Refraction assessment

Refraction refers to how light-waves are bent as they pass through your cornea and lens. A refraction assessment helps your doctor determine a corrective lens prescription that will give you the sharpest vision. If you don't need corrective lenses, you won't have a refraction assessment.

Your doctor may use a computerized refractor to measure your eyes and estimate the prescription you need to correct a refractive error. Or he or she may use a technique called retinoscopy. In this procedure the doctor shines a light into your eye and measures the refractive error by evaluating the movement of the light reflected by your retina.

Your eye doctor fine-tunes this refraction assessment by having you look through a Phoroptor, a mask-like device that contains wheels of different lenses, and judge which combination gives you the sharpest vision. By repeating this step several times, your doctor finds the lenses that give you the greatest possible acuity.

Visual field test (perimetry)

Your visual field is the area in front of you that you can see without moving your eyes. The visual field test determines whether you have difficulty seeing in any areas of your peripheral vision — the areas on the side of your visual field. There are a few different types of visual field tests:

• Confrontation visual field exam. Your eye doctor sits directly in front of you and asks you to cover one eye. You look directly at your eye doctor while he or she moves his or her hand in and out of your visual field. You tell your doctor when you can see his or her hand or fingers.
• Tangent screen exam. You sit a short distance from a screen and stare at a target at its center. You tell your doctor when you can see an object move into your peripheral vision.
• Automated perimetry. Your eye doctor uses a computer program that flashes small lights as you look into a special instrument. You press a button when you see the lights.

Using your responses to one or more of these tests, your eye doctor determines the fullness of your peripheral vision. If you aren't able to see in certain areas, noting the pattern of your visual field loss may help your eye doctor diagnose your eye condition.

Color vision testing

You could have poor color vision and not even realize it. If you have difficulty distinguishing certain colors, your eye doctor may screen your vision for a color deficiency. To do this, your doctor shows you several multicolored dot-pattern tests. If you have no color deficiency, you'll be able to pick out numbers and shapes from within the dot patterns. However, if you do have a color deficiency, you'll either find it difficult to see anything among the dots, or you won't see anything at all within the dot pattern.

Slit-lamp examination

A slit lamp is a microscope that enlarges and illuminates the front of your eye with an intense line of light. Your doctor uses this light to examine the cornea, iris, lens and anterior chamber of your eye.

When examining your cornea, your doctor may use eye drops containing fluorescein (flooh-RES-ene) dye. The orange dye spreads across your eyes to help your eye doctor detect tiny cuts, scrapes, tears, foreign objects or infections on your cornea. Your eyes' tears eventually wash the dye away.

Retinal examination

A retinal examination — sometimes called ophthalmoscopy or fundoscopy — examines the back of your eye, including your retina, optic disk and the underlying layer of blood vessels that nourish the retina (choroid). Usually before your doctor can see these structures, your pupils must be dilated with special eye drops. The eye drops may sting briefly and might cause a medicinal taste in your mouth as the medication eventually drains from your tear ducts into your throat.

After administering eye drops, your eye doctor may use one or more of these techniques to view the back of your eye:

• Direct examination. Your eye doctor shines a beam of light through your pupil and uses an ophthalmoscope to see the back of your eye. Sometimes eye drops aren't necessary to dilate your eyes before this exam. You might see afterimages when your eye doctor stops shining the light in your eyes. This is normal and will go away within a minute or two.
• Indirect examination. For this exam you might lie down or recline in a chair. Your eye doctor will hold each eye open and examine it with a bright light mounted on his or her forehead — a bit like a miner's lamp. This exam lets your eye doctor see the inside of your eye in great detail and in three dimensions. Since this light is brighter than that in a direct examination, you're more likely to see afterimages, but they disappear quickly.
• Slit-lamp exam. In this exam your doctor uses the slit lamp along with an accessory condensing lens or a contact lens. The slit lamp reveals more-detailed views of the back of your eye than do direct or indirect examinations.

The retinal examination takes only five to 10 minutes, but if you're given eye drops, their effects may not wear off for several hours. Your vision will likely be blurry, and you may have trouble focusing your eyes. If you're particularly sensitive to light, you may need to wear dark glasses (or sunglasses) for a short time. You may not be able to drive, so make sure you have another way back to work or home. Depending on your job, you might not be able to work until the effects of the eye drops wear off.

Retinal exam using the Optomap retinal scanning device:

The Optomap Retinal Exam is a simple procedure.  In less than a second with one click of a button, this instrument non-invasively generates a high resolution, digital, color image.  This image becomes a part of your permanent medial record and enables us to enhance the digital image to see more of your retina, measure aspects of your eye and magnify some of the finer details.  We can also track changes in your eye over time by comparing each year's Optomap.  In addition, you take a more active role in your eye care by reviewing the images with your doctor and learning about how to "Protect Your Vision."

The optomap Retinal Exam is used by your eye doctor to get an ultra-wide field view of the retina (the back of the eye). While eye exams generally include a look at the front of the eye to evaluate health and prescription changes, a thorough screening of the retina is critical to verify that your eye is healthy. This can lead to early detection of common diseases, such as glaucoma, diabetes, macular degeneration, and even cancer. The exam is quick, painless, and may not require dilation drops.

An Optomap® Retinal Exam provides:  

• A scan to confirm a healthy eye or to detect the presence of disease.
• An overview or map of the retina, giving your doctor a more detailed view that can be achieved by other means.
• The opportunity for you to view and discuss the Optomap images of your eye with your doctor at the time of the exam.
• A permanent record for your medical file, enabling your doctor to make important comparisons if potential problems show themselves at a future examination.

The Optomap® Retinal Exam is fast, easy, and comfortable.

Glaucoma test

A glaucoma test (tonometry) measures your intraocular pressure — the pressure inside your eyes. It helps your eye doctor detect glaucoma, a disease that causes pressure to build up inside your eyes and can lead to blindness. Glaucoma can be treated most effectively if it's caught early.

Methods your eye doctor may use to test your eyes for glaucoma include:

• Applanation tonometry. This test measures the amount of force needed to temporarily flatten a part of your cornea. Fluorescein, the same orange dye used in a regular slit-lamp exam, is usually put in your eye to make your cornea easier to see. You'll also receive eye drops containing an anesthetic. Using the slit lamp, your doctor moves the tonometer to touch your cornea. It doesn't hurt, and the anesthetic wears off within about 20 minutes.
• Noncontact tonometry. This method uses a puff of air to test the pressure in your eye. No instruments will touch your eye, so you won't need an anesthetic. You'll feel mild pressure on your eye, which can be uncomfortable, but it lasts only seconds.
• Pachymetry. This test measures the thickness of your cornea — an important factor in evaluating your intraocular pressure measurement. After applying numbing eye drops, your eye doctor uses an instrument that emits ultrasound waves to measure your corneal thickness.

Besides these basic evaluations, you may need more specialized tests, depending on your age, medical history and risk of developing eye disease.