Often people say that 300 hours should be enough, and that it marks the ideal amount of time for the CFA level 1 exam preparation process. While that can be true for the majority of candidates, the number of hours you need to prepare depends on your study materials â the curriculum, strategy elements you will use, etc.ften people say that 300 hours should be enough, and that it marks the ideal amount of time for the CFA level 1 exam preparation process. While that can be true for the majority of candidates, the number of hours you need to prepare depends on your study materials â the curriculum, strategy elements you will use, etc.
Performing Cataract Surgery. Most cataracts are highly treatable. Cataract surgery is one of the most common surgeries performed in the United States, with approximately 98% of patients experiencing improved vision if there are no other eye conditions present.
Cataract surgery is used to correct a clouding of the lens of the eye that affects vision and usually is caused by aging. Surgery sometimes is recommended when cataracts have caused blurring of vision too severe to be improved with new glasses, better lighting, anti-glare sunglasses or a magnifying glass. Prescription eye drops usually are required after cataract surgery. 2  Within five years after cataract surgery, one in four patients develop cloudiness on part of the lens capsule that remains in the eye after surgery; to correct this, a five-minute procedure, called YAG laser capsulotomy, is needed.