Hi. I'm online and happy to answer your question today.
In an otherwise normal eye the risk of a retinal detachment in uncomplicated clear lens extraction is very low, I would say on the order of one chance in 10,000 or so.
Of course if you are a very high myope (near sighted) this risk may be slightly higher. If you had any retinal abnormalities, such as lattice degeneration, you surgeon may elect to laser these areas before the surgery.