Fig. 1. Schematic diagram of Alvarez vision-training system with three different configurations.

Fig. 2. Distributions of (a) dioptric power and (b) astigmatism for one lens of the Alvarez system.

Fig. 3. Distributions of dioptric power (left) and astigmatism (right) of the optimized Alvarez system. In (a) and (b), Δd=−5mm, P=−10D. In (c) and (d), Δd=0mm, P=−4D. In (e) and (f), Δd=5mm, P=2D.

Fig. 4. Schematic diagram of the light from FOVs intersecting the surfaces with three configurations.

Fig. 5. Distributions of dioptric power (left) and astigmatism (right) across FOVs of the initial Alvarez system at the evaluation point (0, 0). The distributions are based on (a) Ps(fov,e0) and (b) As(fov,e0), where P=−10D; (c) Ps(fov,e0) and (d) As(fov,e0), where P=−4D; (e) Ps(fov,e0) and (f) As(fov,e0), where P=2D, respectively.

Fig. 6. Dioptric power distributions across FOVs of the optimized Alvarez system at the evaluation points (0, 0) (left) and (3, 0) (right). The distributions are based on (a) Ps(fov,e0) and (b) Ps(fov,e1), where P=−10D; (c) Ps(fov,e0) and (d) Ps(fov,e1), where P=−4D; (e) Ps(fov,e0) and (f) Ps(fov,e1), where P=2D, respectively.

Fig. 7. Astigmatism distributions across FOVs of the optimized Alvarez system at the evaluation points (0, 0) (left) and (3, 0) (right). The distributions are based on (a) As(fov,e0) and (b) As(fov,e1), where P=−10D; (c) As (fov, e0) and (d) As(fov,e1), where P=−4D; (e) As(fov,e0) and (f) As(fov,e1), where P=2D, respectively.