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Conveniently located in the Marketplace Shopping Center between Bishop Ranch and Windemere, and serving San Ramon, Danville, Dublin, and the East Bay region since 1989.

Conveniently located in the Marketplace Shopping Center between Bishop Ranch and Windemere, and serving San Ramon, Danville, Dublin, and the East Bay region since 1989.

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Home » Eyeglasses & Contacts » Contact Lenses » Eye Exams for Contact Lenses

Eye Exams for Contact Lenses

Contact lenses are a great alternative to wearing eyeglasses. An often unknown fact is that not all patients wear contact lenses as their primary source of vision correction. Each patient is different, with some patients wearing contact lenses only on weekends, special occasions or just for sports. That is the beauty of contact lens wear, the flexibility it gives each individual patient and their lifestyle.

If you decide to opt for contact lens wear, it is very important that the lenses fit properly and comfortably and that you understand contact lens safety and hygiene. A contact lens exam will include both a comprehensive eye exam to check your overall eye health, your general vision prescription and then a contact lens consultation and measurement to determine the proper lens fit.

The Importance of a Comprehensive Eye Exam

Whether or not you have vision problems, it is important to have your eyes checked regularly to ensure they are healthy and that there are no signs of a developing eye condition. A comprehensive eye exam will check the general health of your eyes as well as the quality of your vision. During this exam the eye doctor will determine your prescription for eyeglasses, however this prescription alone is not sufficient for contact lenses. The doctor may also check for any eye health issues that could interfere with the comfort and success of contact lens wear.

The Contact Lens Consultation

The contact lens industry is always developing new innovations to make contacts more comfortable, convenient and accessible. Therefore, one of the initial steps in a contact lens consultation is to discuss with your eye doctor some lifestyle and health considerations that could impact the type of contacts that suit you best.

Some of the options to consider are whether you would prefer daily disposables or monthly disposable lenses, as well as soft versus rigid gas permeable (GP) lenses. If you have any particular eye conditions, such as astigmatism or dry eye syndrome, your eye doctor might have specific recommendations for the right type or brand for your optimal comfort and vision needs.

Now is the time to tell your eye doctor if you would like to consider colored contact lenses as well. If you are over 40 and experience problems seeing small print, for which you need bifocals to see close objects, your eye doctor may recommend multifocal lenses or a combination of multifocal and monovision lenses to correct your unique vision needs.

Contact Lens Fitting

One size does not fit all when it comes to contact lenses. Your eye doctor will need to take some measurements to properly fit your contact lenses. Contact lenses that do not fit properly could cause discomfort, blurry vision or even damage the eye. Here are some of the measurements your eye doctor will take for a contact lens fitting:

Corneal Curvature

In order to assure that the fitting curve of the lens properly fits the curve of your eye, your doctor will measure the curvature of the cornea or front surface of the eye. The curvature is measured with an instrument called a keratometer to determine the appropriate curve for your contact lenses. If you have astigmatism, the curvature of your cornea is not perfectly round and therefore a “toric” lens, which is designed specifically for an eye with astigmatism, would be fit to provide the best vision and lens fit. In certain cases your eye doctor may decide to measure your cornea in greater detail with a mapping of the corneal surface called corneal topography.

Pupil or Iris Size

Your eye doctor may measure the size of your pupil or your iris (the colored area of your eye) with an instrument called a biomicroscope or slit lamp or manually with a ruler or card. This measurement is especially important if you are considering specialized lenses such as Gas Permeable (GP) contacts.

Tear Film Evaluation

One of the most common problems affecting contact lens wear is dry eyes. If the lenses are not kept adequately hydrated and moist, they will become uncomfortable and your eyes will feel dry, irritated and itchy. Particularly if you have dry eye syndrome, your doctor will want to make sure that you have a sufficient tear film to keep the lenses moist and comfortable, otherwise, contact lenses may not be a suitable vision option.

A tear film evaluation is performed by the doctor by putting a drop of liquid dye on your eye and then viewing your tears with a slit lamp or by placing a special strip of paper under the lid to absorb the tears to see how much moisture is produced. If your tear film is weak, your eye doctor may recommend certain types of contact lenses that are more successful in maintaining moisture.

A Proper Contact Lens Fitting Includes:

1. An evaluation with a doctor to test vision with the lenses and make sure it fits properly on the eyes to avoid damage or discomfort.

2. A Contact Lens Training with a technician, usually 30-45 minutes per session. This is required by law to ensure the lens can be safely removed and placed into the eye before any lenses can be sent home. This training may be on the same day as your fitting or on a different day. If you would like to schedule them on the same day, please call our office ASAP to confirm that this will be possible. Unfortunately, we cannot send home any lenses, even for practice, until this step is complete. Some patients complete the training in one session, but your fees cover up to 3 sessions, if necessary. Here is a contact lens video to prepare for your training session:

Contact Lens Video: https://www.sanramonfamilyoptometry.com/eyeglasses-contacts/contact-lens-video/

*If you have worn lenses before and can demonstrate safe handling of the lenses when working with the doctor, you may skip this training.

3. Follow-ups: Your doctor may recommend follow-ups to complete your fitting. The fitting fee that you pay will cover any necessary follow-ups within 90 days of the initial contact lens visit.

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**Please note: By doing a contact lens evaluation, you are not obligated to purchase lenses. All necessary trial lenses are provided as part of the fitting. However, any fees paid for the services described above are non-refundable.

If you have any further questions, please do not hesitate to call or email our office. Thank you and we look forward to seeing you soon!

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Our office will be closed on Wednesday Feb. 5th from 1-2:30pm for a staff luncheon. We apologize in advance for any inconvenience. Thank you!