A company by the name of SportRX Inc. makes prescription eyewear for all major sports including tennis. One frame that they recommend for tennis is the Adivista by Adidas. It comes with interchangeable lenses, one for day and another for night (amber for low light enhancement). I really have trouble seeing the ball clearly especially at dusk and at night. Does anyone have experience with this company and these particular lenses? Any other suggestions for products that enhance vision in low light, other than eating more carrots? Thanks.