Why Choose Contact Lenses?
For some people, contact lenses supply more comfort and sharper, clearer vision than glasses. If you are considering making the switch, our Mississauga eye doctor can help. Call our office to set up your contact lens examination and fitting.
Eye Exams for Contact Lenses
Assuming you have discussed your options with our optometrists and have decided to go with lenses, what happens during your contact lens exam?
First you need a comprehensive eye exam. You will undergo an eye test and eye disease screening. In this exam, your optometrist will confirm that you are able to wear contacts and make sure there are no issues that may effective contact lens wear. Some issues that may be discovered, such as dry eye or astigmatism, may not prevent you from wearing lenses but need to be addressed to ensure you have a comfortable fit.If all goes well with step one, you will be able to move onto the actual fitting.
What to Expect: Contact Lens Fitting
Just like a shoe in your size may still not fit you, one contact lens size doesn't fit everyone's eyes. If a contact is too shallow or steep for your eye you could cause harm to the eye.
Many measurements need to be taken such as:
- Corneas: An instrument called a keratometer checks the shape of your eye's front surface (cornea). This estimation helps your specialist pick the absolute best bend and size for your contact lenses. If it is discovered that you have an astigmatism, you may require a "toric" contact lens. It used to be that toric lenses were hard, gas permeable lenses.
However, today there are a number of options for toric lenses including disposable and colored contact lenses.As a rule, a definite mapping of the surface region of your cornea (called corneal topography) is needed. Corneal topography gives very exact data about surface characteristics of the cornea and gives your eye doctor a "guide" of your eye.
- Pupil: and iris measure: your pupil and iris (the hued portion of your eye) can play an essential part in finding the absolute best contact lens, especially if you want GP contact lenses. These measurements are taken with a slitlamp or biomicroscope. It can also be done with a hand-held ruler or template card.
- Tear film evaluation: To be able to wear contact lenses, you must have an adequate tear film to keep the lenses and your cornea wet and hydrated. The test for this is done at our Mississauga office with a liquid dye placed on your eye so your tears can be seen with a slit lamp, or with a small paper strip placed under your lower lid to see how well your tears moisten the paper. If you have dry eyes, contact lenses may not be a good fit for you. Additionally, the amount of tears you produce may determine which contact lens material will work best for you.
Lifestyle in Mississagua
Another factor that will be discussed is your lifestyle. For example, do you want to change your eye color? Would you like to be able to sleep in your lenses? Have a new pair everyday?
You will also be presented with the pros and cons of hard, gas permeable lenses. They can slow down the deterioration of your vision but also have some negatives that some people find hard to live with.If you are over age 40 and require bifocals, your optometrist will go over approaches to handle this need, including multifocal contact lenses and monovision (a prescribing technique where one contact lens corrects your distance vision and the other lens corrects your near vision).
Trial lenses from Dr. Banducci
In many cases, trial lenses will be used to make sure the lens you chose is, in fact, comfortable. Lenses will be placed on your eye and your eye doctor will use the slit lamp to evaluate the position and movement of the lenses as you blink and look in different directions. You will also be asked how the lenses feel.
You'll typically need to wear these trial lenses at least 15 minutes so that any initial excess tearing of the eye stops and your tear film stabilizes. If all looks good, you will be given instructions on how to care for your lenses and how long to wear them. You will also receive training on how to handle, apply and remove the lenses.
Follow Up Visits
Your contact lens fitting will include follow up visits so that your optometrist can make sure the lenses are fitting as they should.
Often, your doctor will have the capacity to see warning signs before you even realize that there is an issue with your contact lenses. In the event that such signs are present, an number of things may be recommended. You may need to try a different lens, use a different lens care strategy, or change your contacts more frequently. In rare cases, you might need to stop wearing contact lenses all together.
Your Contact Lens Prescription
When you find the perfect lens, one that fits well, is agreeable for you, and offers great vision, your eye doctor will then be able to order your lenses.
Don’t forget, even if your contact lenses feel great you still need a yearly eye exam at Dr. Michael Banducci’s!
Source: Contact Lens Tests, short article by AllAboutVision.com. © 2009 Access Media Bunch LLC. All rights held. Generation other than for one-time individual utilization is entirely restricted