  Presbyopia, an age-related ocular disorder, is characterized by the loss in
the accommodative abilities of the human ocular system and afflicts more than
1.8 billion people world-wide. Conventional methods of correcting presbyopia
fragment the field of vision, inherently resulting in significant vision
impairment. We demonstrate the development, assembly and evaluation of
autofocusing eyeglasses for restoration of accommodation without vision field
loss. The adaptive optics eyeglasses consist of two variable-focus
piezoelectric liquid lenses, a time-of-flight range sensor and low-power, dual
microprocessor control electronics housed within an ergonomic frame.
Patient-specific accommodation deficiency models were utilized to demonstrate a
high-fidelity accommodative correction. Each accommodation correction
calculation was performed in ~67 ms requiring 4.86 mJ of energy. The optical
resolution of the system was 10.5 cycles/degree, featuring a restorative
accommodative range of 4.3 D. This system can run for up to 19 hours between
charge cycles and weighs ~132 g, allowing comfortable restoration of
accommodative function
