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. 

Dry Eyes and Winter Weather

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Winter is officially here, and some individuals may already be plagued by dry eyes. In fact, many people with dry eye will find that the symptoms get worse this time of year. The cold, low humidity air dries the eyes out when going outdoors, and inside, heaters trap us in a dry environment day and night. Even our car heaters can exacerbate dry eyes. Contact lens wearers generally experience more discomfort than those without contacts.

Symptoms of dryness include watering, burning, irritation and redness. While these symptoms can be resolved, if left untreated, they can turn into a chronic condition known as dry eye syndrome.

There are multiple things you can do to combat dry eyes in the winter. Using artificial tears prior to going into conditions that will dry out your eyes can greatly reduce symptoms. However, exercise caution when using over-the-counter tears: some only mask the symptoms and can lead to more irritation issues later. Check with your eye care professional to find out which artificial tear works best for you. In addition to artificial tears, humidifiers can help restore moisture in the air inside your home and work. By combating dryness in the air, you will give your eyes some relief. Finally, sun protection or googles can prevent cold air, snow and other particles from irritating the eyes.

If these tips don’t adequately control the dryness, your eye doctor can discuss other treatment options that may be available to you. You don’t have to suffer with dry eye this winter—come see your Rinkov Eyecare optometrists today!

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. 

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.*

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.*

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.*

Can a glasses prescription be used to get contact lenses?

vision wearOur patients sometimes ask us if a they can use their glasses prescription to purchase contact lenses. The short answer is no and if you see an eyecare professional that is using a glasses prescription for contact lenses, we strongly recommend that you RUN as fast as you can out of that office. A competent eyecare professional understands that taking shortcut can result in permanent vision loss for his/her patient. That said, there are several reasons why a glasses prescription cannot be used for contact lenses.

First, the strength of glasses and contact lenses are often different. This is because contact lenses sit closer to the eye and therefore don’t have to be as strong in near-sighted patients, and must be stronger in far-sighted patients. Also any amount of astigmatism is corrected in glasses, whereas astigmatism is only corrected precisely once it reaches a certain level in contact lenses, otherwise the near-sighted or far-sighted power is adjusted to account for this small amount of astigmatism.

Second, and most importantly, is that contact lenses must be matched to the measurements of the cornea that were obtained in the contact lens fitting. On a contact lens prescription the curvature and diameter of the contact lens are specified. The precise brand and material of contact lens must also be specified on the contact lens prescription. This is because all brands of contact lenses will fit, feel, and behave differently on the eye.

Most of our patients are unaware that contact lenses are a regulated medical device. Make you have a reputable eyecare professional perform a contact lens evaluation and fit. This process should take at least 2 visits to make sure that the contact lenses prescribed are right for your eye. Equally as important is to make sure you follow the doctors instructions as to how long you can wear the prescribed contact lenses and what type of solutions to use. Remember, your sense of sight is so important. Don’t risk damaging one of your most precious senses. See an professional and follow the instructions. Anyone is willing to sell you contact lenses without a proper contact lens prescription  is putting their profits ahead of your health.

To learn more about our contact lens evaluation, please click here: Contact Lenses in Columbus, Ohio.

From the Eye Doctor, Opticians and Staff of Rinkov Eyecare Centers. Providing quality comprehensive eye exams, contact lenses, glasses, sunglasses and medical treatment of eye disease. Eye exams and eyeglasses in Columbus, Ohio for over 35 years. Come see an Optometrist at one of our Columbus Ohio 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.*

 

What is astigmatism?

Understanding AstigmatismA lot of our patients ask us what astigmatism is. We find that most think it is a disease or growth in the eye. It is actually just a refractive condition similar to near-sightedness or far-sightedness. It is caused when the cornea or lens of the eye is not perfectly spherical like a baseball, but instead has two curvatures like a football. The curvature is one of the main things to give power to the cornea or lens. Therefore if they have two different curvatures, they have two different powers, and they bend light rays to two different points in the back of the eye. This causes distortion or blur. This can be accommodated for by prescribing glasses or contact lenses with two different curvatures to counteract that of the eye. What to learn more? Check out our website www.rinkoveyecare.com for more information.

From the Eye Doctor, Opticians and Staff of Rinkov Eyecare Centers. Providing quality comprehensive eye exams, contact lenses, glasses, sunglasses and medical treatment of eye disease. Eye exams and eyeglasses in Columbus, Ohio for over 35 years. Come see an Optometrist at one of our Columbus Ohio locations – Downtown, West Columbus, Dublin, Westerville and Reynoldsburg. www.rinkoveyecare.com

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.*

Reasons you should not sleep while wearing your contact lenses!

Traditionally there have been two main reasons why sleeping in contact lenses can be dangerous. The first is that the cornea becomes starved of oxygen and new blood vessels will grow into the cornea. The blood vessels are not transparent like the cornea and will block your vision. With the arrival of the newer silicone based contact lenses that are oxygen permeable, this problem has been greatly minimized. However the other reason for not sleeping in contact lenses still exists. That is that metabolic waste products from the cells of the cornea get trapped under the contact lens while sleeping and cause an inflammatory reaction. This can lead to infections, ulcers, and scarring, all of which can lead to permanent vision loss.

You only have two eyes… vision is so important. Don’t risk harm to one of you most important senses. If you are interested in special contact lenses which are approved for overnight wear, please give us a call.

From the Eye Doctor, Opticians and Staff of Rinkov Eyecare Centers. Providing quality comprehensive eye exams, contact lenses, glasses, sunglasses and medical treatment of eye disease. Eye exams and eyeglasses in Columbus, Ohio for over 35 years. Come see an Optometrist at one of our Columbus Ohio 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.*

 

 

Sleeping with Contact Lenses

Many people want a contact lens in which they can sleep overnight for multiple nights. There are even some contact lenses that are FDA approved for 30 days of continuous wear. These contact lenses gained this FDA approval because they are very permeable to oxygen and let the cornea “breathe”. However, sleeping in contact lenses, whether it be traditional contact lenses or the newer breathable ones, still greatly increases the risk of eye infections. These eye infections, besides being uncomfortable, can be potentially vision threatening. They can lead to corneal ulcers, which have the potential to permanently scar the cornea. This can lead to permanent decrease in visual acuity or blindness. To greatly minimize this risk, it is recommended that all contact lenses be removed and disinfected nightly. As always, at the first sign of any redness, pain, or change in vision, it is advised that your contact lenses should be removed immediately and you should contact your eye doctor.

From the Optometrists, Opticians and Staff of Rinkov Eyecare Center. Providing quality comprehensive eye exams, contact lenses, glasses, sunglasses and medical treatment of eye disease. Eye Doctor serving Columbus, Ohio for over 30 years. Downtown Columbus, West Columbus, Dublin, Westerville and Reynoldsburg. Sunglasses to protect your eye and make you look good!