Presbyopia must see 10 minutes to correct vision
Last week, the US FDA approved the Raindrop Near Vision Inlay product from ReVision Optics, Calif., for presbyopic patients aged 41 to 65 who have not had cataract surgery. This is a medical device that is embedded in the cornea of ​​the eye and can effectively improve the vision of some presbyopic patients. This is the first implantable device approved by the FDA to improve the patient's vision by changing the shape of the cornea.
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The formation of presbyopia is due to the loss of the ability of the eye to focus on the close object, resulting in a decrease in vision. Due to the natural aging phenomenon, after the person reaches the age of 40, the lens will begin to lose its elasticity, which reduces the ability of the eye to focus and greatly affects the quality of life. Both the double mirror and the reading glasses are common corrections, but they are not a very convenient solution for the elderly. Laser surgery can also improve vision, but the operation itself is complicated and costly.
Therefore, a simple and permanent one-time solution is clearly a better choice for presbyopic patients. Raindrop is a transparent hydrogel corneal implant with a diameter of 2 mm and a thickness of 32 microns. Its composition is mainly a hydrogel containing 80% moisture, similar to a tiny contact lens, and its water content and refractive power are both Similar to the cornea. Raindrop can effectively change the anterior curvature of the cornea and improve the near vision of presbyopia patients through the multifocal effect.
Raindrop schematic
At the time of the operation, the patient only needs to receive local anesthesia, and the ophthalmologist uses a laser to create a notch in the non-primary eye cornea, and drops the hydrogel implant, and then repairs the cornea to complete successfully. It is. Surgery takes only 10 minutes, much faster than traditional laser surgery. In addition, the insert provides a curved surface that helps the eye focus on nearby objects. The lens is originally capable of performing such a zooming function by shape change, but it becomes aging and stiff in the eyes of presbyopic patients, thereby losing the above adjustment ability. By reshaping the curvature and curvature of the cornea, this corneal inlay can successfully correct refractive errors and improve vision problems in presbyopic patients.
Raindrop was tested for safety and efficacy in a clinical trial involving 373 subjects. After two years of implantation, 92% of patients were able to achieve a visual acuity of 0.5 or better.
Dr. William Maisel, deputy director and chief scientist of the FDA's Center for Devices and Radiological Health, is very optimistic about this technology: "In view of the high incidence of presbyopia and the aging of the population, the need for vision correction will rise in the next few years. Raindrop Embed Surgery provides a new option for outpatient treatment of presbyopia."
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