Hello, previously my RE -4.25 and LE -3.75 , now i went to lenskart just to chnge my glasses as there are scratches in my specs lens, and as per them after checkup my right eye power chnges to -4.5 , should i changes my power as my power is already high and i dont feel any discomfort with them. And i also want to know ,i previously used specs with norml fibre ,no blue ray as i bought them from some other store. Can i again buy the same one . Or i have to go with blue ray necessarily. I have to work in computer full day. I dont know about cylinderical power previously and lenskart said there are some chnges in those as well. Does that also requires different power specs.