This article claims only surgery is effective:
"Surgery is the best way to cure cataracts. There is no medicine that can prevent or cure them," according to the article, which cited a report on Blindness Prevention and Treatment, a website affiliated with the National Health and Family Planning Commission.
But here is a machine translation of some paragraphs in a Chinese patent from 2014. It specifies 22 herbs including, for example, lotus leaf, mulberry leaf, chrysanthemum flower and buddleia flower.
Case 1: Liu, female, 73 years old, suffering from cataracts more than ten years, eyes blurred, things almost invisible at night, great suffering, taking multiple drugs for treatment of cataract, but the effect is not ideal. After taking the Chinese medicine composition of the present invention once per day, after taking two courses, her visual acuity increased, and after a further two courses, the vision returned to normal.
Case 2: Hu, male, 47 years old, suffering from cataract for two years, progressive vision loss which had been worsening recently. After taking the herbal composition of the present invention once per day, even after one month visual acuity improved, and after a further two courses, the vision returned to normal, so far no recurrence.
Case 3: Gu, female, 68 years old, suffering from cataract for more than ten years, only 0.4, 0.3 vision, blurred vision, many western medicines were ineffective, but after taking the herbal composition of the present invention once per day, even after three courses, visual acuity was 0.7, 0.8, and cataract has not relapsed.
I found some other patents like this on the Web. I suppose it is not possible to know whether the case studies are exaggerated.