For ocular adaptive optics systems, there is no necessary to calculate Zernike mode coefficients during iterations. A modified algorithm based on reset of control signals is proposed. The modified algorithm is more suitable for ocular adaptive optics because both calculating time and storage space are saved. After principle description and computer simulation, the algorithm is tested on a retinal imaging system which is based on dual deformable mirrors. The two deformable mirror are controlled fast and stably. High resolution retinal images are acquired. Both simulation and experimental results indicate that this algorithm can effectively compensate for phase distortions and significantly suppress the coupling between two deformable mirrors.