Articles tagged with Refraction
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The study found that contaminated contact lens storage cases pose a significant risk of severe eye infection, with pathogens detected in over two-thirds of cases. Refractive surgery practices for people with HIV/AIDS are also highlighted, with most surgeons taking precautions but acknowledging the need for formal study.
A new model predicts visual clarity from wavefront aberrations, enabling the use of aberrometers to automatically produce prescriptions. The metric could be used internationally and provide direct predictions of visual acuity.
The American Society of Cataract and Refractive Surgery (ASCRS) will participate in a study with the US FDA to examine the impact of LASIK on patients' daily lives. The study aims to identify ways to enhance patient care, improve screening and counseling, and better understand quality of life.
Researchers have developed a new system to improve hearing in patients with cochlear implants, analyzing Compound Action Potential records and voice processor programming. The study found that refractory periods decrease with auditory experience, reaching a stable value after 3-4 months.
Researchers at PNNL present advances in coal gasification technology that could increase efficiency and safety, enabling carbon capture and sequestration technologies. The technology has the potential to play a critical role in securing domestic sources of transportation fuels and meeting growing demand for clean energy.
Researchers developed a one-step test using holograms to diagnose astigmatic error, a key factor in prescribing glasses. The new technique is simpler and faster than traditional methods, which involve multiple lenses and complex processes.
Researchers found cases of MRSA infectious keratitis following refractive surgery in patients with no known exposure to healthcare facilities. Colonization of MRSA is common, especially among those exposed to healthcare settings.
A study found that older men and women have a similar and substantial risk of subsequent fracture after an initial low-trauma fracture. This highlights the importance of preventive treatment, as virtually all low-trauma fractures indicate increased risk of subsequent osteoporotic fracture, particularly in the next 5-10 years.
A new radar technique is being tested to track water vapor in the lower atmosphere, helping forecasters predict storm locations and timing. The REFRACTT project uses multiple Doppler weather radars to measure changes in radar signals caused by refraction, revealing the presence or absence of atmospheric moisture.
Preliminary results from the study show that E7389 induces partial responses in patients with refractory breast cancer. The predominant serious side effect was neutropenia, but mild to moderate side effects were also reported.
Researchers found propofol to be an effective treatment for continuous seizures in children, controlling seizures in 14 out of 22 patients. Propofol was preferred over thiopental due to lower side effects and fewer respiratory problems.
The customized ablation technique has revolutionized eye surgery, allowing patients to enjoy enhanced vision with reduced side effects. Increasing the treatment zone size and precise laser positioning have significantly improved results.
Wavefront-guided LASIK yields sharper and higher quality vision, as well as improved night driving abilities compared to conventional LASIK. With wavefront-guided LASIK, patients achieve 97% of 20/20 vision and 85% with 20/16 vision, significantly outperforming conventional LASIK.
A study by the Chinese University of Hong Kong found that orthokeratology contact lenses may cause permanent vision loss in children if not worn properly. The study highlights the risks of corneal ulcers and infection associated with overnight OKL wear, which deprives the corneas of oxygen.
A study published by the American Academy of Ophthalmology identified high patient volume as the greatest risk factor for increased chances of incurring malpractice claims or lawsuits. Other risk factors included prior claims or lawsuits, male surgeon gender, advertising, time spent with patients, and co-management with optometrists.
A new study published in American Journal of Hypertension found that the Resperate device significantly reduced blood pressure in patients with hard-to-control refractory hypertension. The 8-week study demonstrated that daily self-treatment with the device reduced blood pressure, even in those taking multiple antihypertensive medications.
A recent study found that patients over 40 years old have a higher risk of needing LASIK retreatments, while those with high refractive error and astigmatism also require more frequent corrections. The study's results suggest that lifting flaps using manual technique can reduce the need for recut flaps during retreatments.
A low-tech handheld refractometer can detect counterfeit malaria drugs and has the potential to be used to test mass batches of drugs imported from overseas. The device is relatively inexpensive and simple to use, making it a viable option for people in developing countries with limited resources.