Why is my contact lens prescription a different strength than my glasses prescription?

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Many contact wearers notice that the numbers on their contact lens prescription are different from the numbers on their glasses prescriptions. While some patients may think this is a mistake, there is a very simple explanation: distance.

The distance at which a corrective lens sits from the eye causes a notable difference in the strength of the prescription. This can easily be demonstrated by taking one’s glasses and extending them further away from the surface of the eye. If you have a nearsighted prescription, you will notice the power of the lens becomes weaker as you move it further away, and a farsighted prescription becomes stronger as you move it further away. Because of this, it is important that glasses prescriptions be tested at a similar distance to where a frame sits from a patient’s eye. During an eye exam, your doctor uses a phoropter to present multiple lens options at approximately 12 millimeters from the surface of the eyes.

When fitting contact lenses, the prescription must be adjusted, because contacts are placed directly on the eye, which is 12 millimeters closer than eyeglass lenses.  For nearsighted prescriptions, this means that the minus power of the contact will need to be weaker than in a glasses prescription. For farsighted prescriptions, it means the plus power of the contact will need to be stronger than in a glasses prescription. This difference varies depending on the strength of the prescription and only affects prescriptions over four diopters.

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley, Worthington and Nationwide Plaza.

How to Have Healthier Eyes in 2015

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We promise this resolution is easy!

We promise this resolution is easy!

Now that the New Year is under way, many people are working on their New Year’s resolutions. You may be working on getting fit, getting organized or getting your finances in order, but there is one easy resolution you probably forgot about: taking better care of your eyes. By making a few minor changes, you will be crossing this resolution off your list in no time.

 

  1. Schedule a yearly eye exam

A yearly eye exam is the first step to better eye health and it is essential to catching any early signs of eye disease. Many feel if they are seeing well, an eye exam is not necessary. This is not true, because many eye diseases do not show symptoms until it is too late. In addition, annual eye exams can alert your doctor to changes in your overall health.

  1. Wear your sunglasses

Sunglasses are not just a fashion statement, nor are they just for people who need prescription sunglasses. Your shades help to shield your eyes from UV radiation, which can contribute to cataracts, macular degeneration, and cancers of the eye. They can also protect your eyes from particles in the air.

  1. Follow your contact lenses’ directions

For those who wear contact lenses, you can drastically improve your eye health by simply following the directions for your contact lenses. Most people wear their contact lenses longer than what is recommended by their eye doctor every day. By following your optometrist’s recommendations, you can drastically reduce discomfort and risk of infections from over-wearing your contact lenses. Many contact lens wearers fail to replace their contacts on the schedule prescribed. Wearing your contact lenses past the replacement date makes you much more vulnerable to eye infections and permanent scarring of the cornea. If you’re running low on your contacts, make sure you have a current prescription and order new ones ASAP. 

By following these three simple steps, you will be able to cross this resolution off your list. These minor changes will not only lead to healthier eyes, but a healthier you.

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley, Worthington and Nationwide Plaza. 

Back to school contact lenses

Back to school contact lenses

As many children are seeing their eye doctor for their annual eye exams before school starts, many are considering contact lenses in addition to their glasses. Contact lenses have several benefits over glasses.

Better peripheral vision is attained with contact lenses. It is not possible to look out beyond the edge of the lens with contact lenses as it is with glasses. This can be very helpful when playing sports like football and basketball.

Glasses lenses tend to fog when going from cold to warm environments or when the wearer is hot and sweating. This does not happen with contact lenses. Contact lenses also won’t slide down the end of your nose when sweating, like glasses can.

Better vision is attainable with strong prescriptions with contact lenses. Glasses lenses will magnify or minimize the image seen when the prescription is high, while true image size is attained with contact lenses.

While contact lenses may not be for everybody, they do have benefits beyond just cosmetic advantages.

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley and Nationwide Plaza. 

CARE : 20|20 : LIFE

*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor or healthcare professional.*

Contact lenses and allergies

Contact Lenses and Allergies

Many patients come in this time of year complaining of contact lens intolerance.  Sensitivity to changes in the environment can cause inflammation and dryness of the eyes, but this doesn’t always mean you have to give up your contact lenses. For some patients, switching to a different cleaning solution can help rid the lens of irritating particles. Other patients may find relief by using prescription or over-the-counter allergy eye drops before or after lens wear. Daily disposable lenses can also provide increased comfort since they ensure a clean, fresh lens with each wear.

If you are having comfort or vision issues with your current lenses it is best to schedule an appointment with your eye doctor to see which of these solutions may work best for you.

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley and Nationwide Plaza. 

CARE : 20|20 : LIFE

*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor or healthcare professional.*

Eye discomfort: Old contacts or something more serious?

Image of eye discomfort

Often when performing a yearly exam on a contact lens wearer, we may find small circular scars on the cornea. Patients often say they’ve experienced contact lens discomfort, redness and light sensitivity that lasted a few days to a week. They assumed they were wearing the contact lens too long or it was dirty and needed replaced. While it is true that an old or dirty contact lens can cause discomfort, the discomfort should stop upon removal of the contact lens. Scars that are seen on the cornea are a sign that the patient was developing an ulcer on the cornea. An ulcer is an area where bacteria start to eat into the surface of the cornea. This is dangerous because scarring over your line of sight can lead to worsening eye damage or even permanent vision loss.

Any time a contact lens wearer experiences pain, redness or decreased vision, he or she should remove the contact lens immediately and visit their eye doctor to catch any problems early. Call or request an appointment online.


From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley and Nationwide Plaza. 

CARE : 20|20 : LIFE

*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor or healthcare professional.*

Don’t worry, astigmatism is not a disease!

Astigmatism Diagram

Many times people hear that they have astigmatism and think it’s some sort of eye disease. This is not the case. Astigmatism is an optical or refractive disorder, similar to near sightedness and far sightedness. Astigmatism occurs when the cornea or lens of the eye has two different curvatures, similar to a football rather than a baseball. Having two different curvatures causes it to have two different powers, and it bends light through the eye differently. This causes a distortion that can be corrected by wearing glasses or contact lenses with two different curvatures that counteract the curvatures of the eye.

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley and Nationwide Plaza. 

CARE : 20|20 : LIFE

*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor or healthcare professional.*

The truth about your contact lens case

Contact Lens Case

While many contact lens wearers neglect to clean and replace their contact lenses as directed, many do follow the proper care instructions. However, one aspect of contact lens hygiene that is often overlooked doesn’t involve the contact lenses at all. It is the contact lens case. Some contact lens cases are brought to the eye doctor’s office looking like they are decades old, and in many cases they may be. Even if the inside wells of the case look clean, a clear biofilm from microbes builds up on the inside. This can contaminate your clean contact lenses. After applying your contact lenses to your eyes, the contact lens case should be dumped, rinsed with clean contact lens solution, and let to air dry. Perhaps most importantly, the case should be replaced every three months, just as you would replace your toothbrush.

Click here to see more tips on contact lens care.

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley and Nationwide Plaza. 

CARE : 20|20 : LIFE

*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor or healthcare professional.*

Advantages of daily disposable contact lenses

Daily Disposable Contact Lenses

Daily disposable contacts are becoming increasingly popular because they are one of the healthiest options available to patients—and one of the most comfortable.

Healthier Eyes

Frequently replacing your daily contact lenses reduces the amount of time they spend in contact solution and reduces the chance of contamination from an old dirty contact lens case. This has been shown to reduce the rate of eye infections compared to other types of contacts.

Increased Comfort

It’s also more comfortable to start with clean contact lenses everyday. This is especially important with allergy sufferers, whose eyes tend to deposit more proteins and can be more reactive to allergens that remain with longer wear contacts.

Fortunately contact lens companies have been able to manufacture the lenses in a cost effective manner to help manage costs and keep increasing options available for daily disposable contact lenses. They’ve also developed a new, cost-effective daily disposable multifocal lens and expanded options with astigmatism patients with a new toric lens.

Call or visit your Rinkov Eyecare Centers location to see if daily disposable contact lenses will work for you!

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley and Nationwide Plaza. 

CARE : 20|20 : LIFE

*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor or healthcare professional.*

What is exactly is your cornea?

Image of cornea

Have you ever heard the term “cornea” and weren’t sure what it meant? The cornea is the clear tissue on the very front of your eye. Contact lenses are placed directly onto the cornea. Over-wearing contact lenses can cause changes to the cornea. Some changes such as new blood vessels, scarring, and infections can be seen during routine examination. Some changes occur on the cellular level and can only be seen with a specular microscope. Having annual eye exams ensures that your corneas stay healthy.

Find proper contact lens insertion and removal tips here!

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West, East, Westerville, Dublin, Bexley and Nationwide Plaza. 

CARE : 20|20 : LIFE

*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor or healthcare professional.*

Warning: Beware of costume contact lenses

halloween contact lenses

It’s Halloween and many people are tempted to accentuate their costumes with cosmetic contact lenses. With a quick online search, a person can find many websites offering cosmetic contact lenses for sale, and many of them claim that no prescription is needed. This is untrue and unsafe. All contact lenses, whether vision correcting or cosmetic, are labeled as medical devices by the FDA and therefore require a doctor’s prescription. A prescription is required to ensure that the contact lens fits your eye correctly. An improperly fitting contact lens can cause injury and scarring of the cornea, which can result in permanently reduced vision or even blindness. Having “cool” contact lenses to go along with your costume is not worth the risk to your eyes and vision.

If you have any questions or think your contacts have scratched or scarred your eye, please call your closest Rinkov Eyecare Center immediately for attention.

From the eye doctors, opticians and staff at Rinkov Eyecare Centers. We’ve provided comprehensive eye exams, contact lenses, eyeglasses, sunglasses and medical treatment of eye disease such as cataract treatment in Columbus, Ohio, for over 35 years. Come see an optometrist at one of our Columbus locations – Downtown, West Columbus, Dublin, Westerville and Reynoldsburg.

CARE : 20|20 : LIFE

*this advice is general in nature and does not constitute an exam. For specific advice, see your eye doctor or healthcare professional.*