31 janvier 2019 0 Commentaire

Tips to Avoid Contact Lens Infections

Considering the vast amount of changes our bodies undergo within the normal aging process, one the most predictable, and one often considered a hallmark of middle age, is the onset of presbyopia คอนแทคเลนส์. This is the very normal, progressive loss of the capacity to keep carefully the eyes in focus at close reading distances. Age onset is normally late 30′s to early 40′s. There are rare exceptions, and some individuals do manage to hold out to their 50′s. Eventually, however, we all must accept this increasingly obvious complication. This dilemma can be especially distressing for anyone individuals who have been wearing contact lens corrections as much as this time.

Having spent 32 plus years assisting patients, family and friends cope with this particular change, I wish to offer some simple observations and suggestions for keeping contact lens wear as an operating option. These observations pertain to both rigid and soft contact lens wearers, but the great majority of the affected now likely have been wearing soft contacts considering that the 70′s or 80′s.

Cheaters – Elegant Simplicity

Most contact lens wearers, especially those involved with recreational or competitive sports, are well-advised to keep with their current distance-correcting lenses and simply use inexpensive, commercially available reading glasses for close vision tasks. In the first stages of presbyopia reading assistance is usually needed only for certain situations, such as for example low lighting in restaurants and theaters, or for extremely small printed details, like maps and medicine bottles.

With advancing age, while the reading issues are more profound, other options, such as for example multi-focal lenses, can be explored. The usage of simple reading glasses retains the great distance vision from the old lenses and provides quite effective near vision. Since the presbyopia deepens, stronger reader powers is going to be required, and different powers is going to be needed for different working distances. Reading a guide at 16 inches requires as stronger reading lens than working at some type of computer monitor at 22 inches. Cheaters are available everywhere, and can be quite a fun fashion accessory. They’re also obtainable in safety glass and sunglass designs.

Mono-vision – History Revisited

The old photos of historical figures wearing monocles depict a vision correction still widely employed today, especially among contact lens wearers. The long absence of functional multifocal contact lens options triggered patients and their eye doctors seeking some way of dealing with presbyopia without the utilization of the stigmatizing reading glasses. The manner of correcting the vision in one single eye for distance and the other eye for reading is known as mono-vision. This ancient technique is super easy to test, especially with modern soft lenses, but it is poorly tolerated by many patients who attempt it.

Obviously, mono-vision will disrupt normal binocular vision and restrict distance visual acuity and depth perception. Curiously, those that are able to tolerate the imbalance do surprisingly well for a lot of years. Mono-vision must never be used by individuals requiring optimum distance vision and binocularity, such as for example commercial vehicle operators, pilots, or professionals a part of precise, near-point depth tasks. A straightforward trial in the attention doctor’s office can determine if this go-or-no-go application is viable.

Multi-focal Contact Lenses – Slowly Getting There

Multi-focal contacts have already been obtainable in rigid contact lens designs for over fifty years, however not before fairly recent explosion of availability in soft lens configurations have they been a really viable choice for the huge population of emerging presbyopes. All the major soft contact lens manufacturers have entered the multi-focal market. Lenses can be purchased in a wide variety of materials, both conventional daily-wear and new, oxygen-permeable silicon materials. Even significantly astigmatic patients now have multi-focal lens possibilities to them. Virtually all the new multi-focal designs employ an element called simultaneous vision, wherein the attention is viewing through both the length and near the main lens all the time. The various companies try different combinations and arrangements of both optical zones, but there remains a significant similarity in all the designs. Practically speaking, this means that both distinct power zones inevitably enter each other’s way.

The problem most often reported by my patients is just a significant lowering of visual acuity during night driving, with annoying amounts of flare around lights. This results from the enlarged, dark-adapted pupil allowing more light to enter through both conflicting zones of the contact lens. Some patients are definitely better able to cope with this particular than others. I have experienced some considerable success using a contemporary form of mono-vision, with a distance-only lens on one eye and a bifocal on the other. Fitting multi-focal lenses involves a great deal of necessary trial-and-error, and it is crucial that there be significant communication between patient and doctor if you have to be always a truly functional result.

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