Category: Hyperopia

What are the Advantages of Daily Use Contact Lenses?

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Soft daily use contact lenses have been available since 1995. The obvious advantage of replacing contact lenses daily is placing a clean, sterile, well-hydrated lens in your eye each morning. Even with the best cleaning and hygiene; lenses get dirty, lose their ability to stay wet and protein adheres to the surface. These factors reduce comfort, cause dryness and decrease lens clarity.

The other advantage is the elimination of contact lens solutions and the complications resulting from solutions. The contact lens solution industry changes as often as the lenses. Most contact lens complications result from sensitivity to the solution or poor compliance. Eliminating this component from the care of contact lenses, resolves multiple problems.

Probably the greatest advantages to patients is the convenience. No more contact lens solutions, no contact lens cases, just a clean, clear and comfortable lens each day.

For intermittent wearers, someone who uses lenses for sports, social events or infrequently, the daily lenses are easier to keep on hand, in a gym bag, briefcase or backpack. No more trying to remember how old a lens is, or opening the case to find dried up lenses.

One of the disadvantages is that not all prescriptions are available in daily disposable lenses. There are some toric lenses (astigmatism correction) in limited powers but not enough. Currently there is not a decent multifocal daily contact lens (although, this will be available in the future). The second disadvantage of daily replacement lenses is they are not designed for overnight use and must be removed before sleeping.

Reliability of Vision Screenings

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     The department of motor vehicles, the school nurse and the pediatrician use vision screening to identify vision problems. Screening usually involves standing a given distance from a lettered chart, covering one eye and reading down the chart to the smallest letter possible.
     According to a recent study in Australia, researchers found that results for detecting myopia in 12 -13 year olds was nearly 98%. Good news for the nearsighted, but not so good for the tweens with astigmatism or hyperopia. Only half of the hyperopic children were identified by the vision screening and 25% of the kids with astigmatism were missed.
Screenings are best designed to detect problems with distance vision, and that is important for children socially and physically, but myopia represents the least risk for reading and learning. A myopic child is more likely to notice that the board is blurry and move to the front of the classroom. Hyperopia on the other hand, makes it more difficult to see things close up and astigmatism effects vision at all distances. Children with uncorrected hyperopia and astigmatism will have more difficulty reading and writing and may not even be aware that the difficulty is due to his or her vision. These are the children that may complain of headaches, avoid reading and school related tasks.
     A vision screening test identifies some vision problems, but can miss disorders that have a profound effect on a child’s ability to succeed in school.