Ophthalmology / 18.04.2024
Pros and Cons of LASIK
Although LASIK has been around for decades, people still have to weigh the pros and cons before going ahead with the surgery. One prominent thing could dissuade people who are interested in it from getting it - the most important LASIK candidacy factors. Simply put, not everyone will be able to have the surgery. The reasons, as the link shows, include having too strong a case of nearsightedness, farsightedness, or astigmatism.
Pro: It's a Very Fast Surgery
When you compare it to other surgeries involving things that play a large part of your senses, a 10-minute surgery is astonishing. You'll be surprised at how quickly things go, even when you're spending some of the time with your eyes pinned open. As a result, you'll feel relief that you're out of the operating room as soon as you are. Since your eyes will be open the entire time, too, you won't have to worry about that post-anesthesia nausea that some people have when they are put under.
Con: There Are Some Possible Risks
Yes, LASIK has been around for a long time, but that doesn't mean that it's completely perfect. Some people do have some side effects. Even if they didn't have dry eye before, some people can have it for roughly three months. Dry eye is when your eyes can't produce tears, which then leads to them feeling grainy. Other things include having hazy vision, nighttime glare (which can make driving at night dangerous.
Pro: It's a Very Fast Surgery
When you compare it to other surgeries involving things that play a large part of your senses, a 10-minute surgery is astonishing. You'll be surprised at how quickly things go, even when you're spending some of the time with your eyes pinned open. As a result, you'll feel relief that you're out of the operating room as soon as you are. Since your eyes will be open the entire time, too, you won't have to worry about that post-anesthesia nausea that some people have when they are put under.
Con: There Are Some Possible Risks
Yes, LASIK has been around for a long time, but that doesn't mean that it's completely perfect. Some people do have some side effects. Even if they didn't have dry eye before, some people can have it for roughly three months. Dry eye is when your eyes can't produce tears, which then leads to them feeling grainy. Other things include having hazy vision, nighttime glare (which can make driving at night dangerous.
Dr. Hafezi-Moghadam[/caption]
Ali Hafezi-Moghadam, Ph.D., M.D
Director, Molecular Biomarkers Nano-Imaging Laboratory (MBNI)
Associate Professor of Radiology, Harvard Medical School
Brigham and Women’s Hospital
MedicalResearch.com: What is the background for this study?
Response: “It is very easy to answer many fundamental biological questions” said Richard Feynman in his 1959 address, where he also offered his simple and ingenious solution: “you just look at the thing!”
Dr. Singh[/caption]
Dr. Saundra Singh M.D., Ph.D.
Founder & CEO/President
MedicalResearch.com: What is the mission of
Prof. Rahi[/caption]
Prof. Jugnoo S Rahi
Professor of Ophthalmic Epidemiology and Honorary Consultant Ophthalmologist
NIHR Senior Investigator
Head,
Dr. Lee[/caption]
Cecilia S. Lee, MD, MS
Associate Professor,Director, Clinical Research
Department of Ophthalmology
Harborview Medical Center
University of Washington Seattle, WA
MedicalResearch.com: What is the background for this study?
Response: Cataract is a natural aging process of the eye and affects the majority of older adults who are at risk for dementia. Sensory loss, including vision and hearing, is of interest to the research community as a possible risk factor for dementia, and also as a potential point of intervention. Because cataract surgery improves visual function, we hypothesized that older people who undergo cataract surgery may have a decreased risk of developing Alzheimer disease and dementia.
We used the longitudinal data from an ongoing, prospective, community based cohort, Adult Changes in Thought (ACT) study. The ACT study includes over 5000 participants to date who are dementia free at recruitment and followed until they develop Alzheimer disease or dementia. We had access to their extensive medical history including comprehensive ophthalmology visit data. We investigated whether cataract surgery was associated with a decreased risk of developing Alzheimer disease and dementia.
Dr. Dalton[/caption]
Kristine Dalton PhD FAAO, FBCLA
School of Optometry & Vision Science
University of Waterloo
Waterloo, Canada
MedicalResearch.com: What is the background for this study?
Response: Dynamic visual acuity refers to the ability to detect and perceive small details in objects that are moving relative to an observer. Dynamic visual acuity is a complex visual function, that involves a number of different aspects of vision, including detecting the target, moving the eyes appropriately to observe the target, and processing the visual information from the target in the brain to interpret what we are seeing. What makes dynamic visual acuity so interesting to study, is that as a visual function, it appears to play an important role in a number of real-world situations, including playing sports, driving, and piloting, and it may provide us more information about how the visual system is functioning compared to the more traditional, static vision tests alone.
Previous research has demonstrated that consumption of caffeine has been shown to benefit physiological, psychomotor, and cognitive performance. More recently there has been an increased interest in studying the impacts of caffeine on the vision system, however the impact of caffeine on dynamic visual acuity has not been studied. This study was designed to address this limitation in the literature, particularly because dynamic visual acuity appears to be such an important visual function for real-world activities.
Dr. Walline[/caption]
Jeffrey J. Walline, OD PhD
Associate Dean for Research
The Ohio State University
Columbus, OH 43210-1240
MedicalResearch.com: What is the background for this study?
Response: Greater amounts of nearsightedness are related to higher risks of sight-threatening complications in adulthood, so anything we can do to slow the progression of nearsightedness in childhood can have meaningful benefits in the future.
As the prevalence of nearsightedness increases worldwide and affects approximately 1/3 of the people in the United States, a treatment that provides clear vision AND slows the progression of nearsightedness can have a profound effect.
Prof. FAN Zhiyong PhD
University of California, Irvine
HKUST School of Engineering
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: According to the report of The World Health Organization, there are over 252 million people suffering from visual impairment globally and 15 million of them are difficult to cure by conventional medical methods. However, today, even the best bionic eyes have only 200 clinical trials, less than 1 ppm of all the patients, mainly due to their poor performance and high cost. The huge gap in supply and demand triggers the study of bionic eyes with performance comparable to human eyes. One important reason for their poor performance is the mismatch in shape between the flat bionic eyes and concave sclera. To protect the soft tissue in eyes from being damaged by the bionic surface, the implanted bionic eyes have to be small. This has limited the sensing area and further the electrodes number, and finally yielded poor image sensing characters with low resolution and narrow field-of-view.
In this work, we are trying to achieve high performance image sensing by biomimeticing human eyes. The high-density NWs are well aligned and embedded in a hemispherical template to serve as retina. The conformal attachment of bionic eyes with sclera enables the large sensing area and wide visual angle. In addition, each individual high-density nanowires can potentially work as an individual pixel. By addressing these challenges, our device design has huge potential to improve the image sensing performance of bionic eyes.
Dr. Ritch[/caption]
Robert Ritch, MD, FACS, FARVO
Shelley and Steven Einhorn Distinguished Chair
Professor of Ophthalmology, Surgeon Director Emeritus
Chief, Glaucoma Services Emeritus
The New York Eye and Ear Infirmary of Mount Sinai
New York, NY 10003
Founder, Medical Director and
Chairman, Scientific Advisory Board
The Glaucoma Foundation
MedicalResearch.com: What is the background for this study?
Response: Nailfold capillaroscopy (NFC), long used in rheumatology is a new approach to investigation of glaucoma.
Posterior to the nailbed and just anterior to the proximal nailfold is the cuticle, which has no structural elements visible to the naked eye. NFC is a non-invasive imaging modality that provides a highly magnified view of the capillaries at the nailfold of digits. It has also been used in ophthalmology to show morphological changes at the nailfold capillaries of POAG and XFG/XFS patients, helping to confirm the systemic nature of these diseases.
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