Active illumination couples imaging intensification technology with an active source of illumination in the near infrared or shortwave infrared band. Examples of such technologies include low light cameras. Another theory posits that since stars typically emit light with shorter wavelengths, the light from stars will be in the blue-green color spectrum. Therefore, using red light…
If an underlying medical condition goes undiagnosed, your visual acuity will not improve much with glasses or contacts. Anterior blepharitis can actually put one at risk for creating a significant eye infection while wearing contacts because of the level of bacteria hanging out the eyelid. Plus, the crusty debris can spill over into the tear…
most important what to look for when trying out new glasses. There are many signs to find when evaluating your glasses for fit. This isn’t advisable either, as you’re basically covering your lens with germs from your mouth, that may then multiply. From the practical perspective, your saliva may also make the smudge look worse….
First and foremost, who wants bacteria on their face? Eliminating bacteria, dirt, and oils from your own face is a priority for almost everyone. So are facial tissues, even though they could seem soft. Sweating, trace amounts are going to accrue on your lenses. Unsurprising, since they are the two elements of your glasses that…
continuous and seamless vision can be done at all distances. Phaco cataract surgery is conducted yourself and involves checking the eye to gain usage of the cataract. Ultrasonic energy is then used to break up the cataract, which is then removed in pieces through gentle suction. Once the cataract is removed, a foldable intraocular lens…
Photodynamic therapy is a medical treatment that utilizes a photosensitizing molecule and a source of light to activate the administered drug. Very thin superficial skin cancers called actinic keratoses and certain other types of cancer cells could be eliminated this way. Make sure you review the best practices for applying your preferred cosmetics before, during,…
Reactive oxygen species will be the main mediators of pain experience during PDT, and contribute to stimulation of sensory neurons that conduct pain to sensory cortex of the mind. Intensity of pain could be determined by the depth of singlet oxygen production in the skin, which in turn depends upon the nature of the photosensitizer…
Then check that the lens measurements match those written on the job order form. Only then as long as they put the glasses you and look at how they align with your eyes. Common errors are fitting the distance area too much or too low or missing that one eye is a lot higher or…
to your eyes. This may manifest as blurry or double vision, changes to your near or far vision, and eye strain or fatigue. You may think you merely need glasses, if a vision is changing rapidly, you might have another, underlying condition that is evoking the refractive error. Even for those who have worn glasses…
While complications that create a loss of vision are rare, certain side effects, particularly dry eyes and temporary visual disturbances, are fairly common. But these usually resolve following a few weeks or months, and incredibly few people consider them to be a long-term problem. Another way of saying that is that about 9 out of…