I also had some problems with my 視網膜 earlier this year (but I think is different from your mother's case). My brother's friend, who is a 眼科醫生, recommended him for me, saying that he is an expert on 視網膜. I have searched the web and found he is 十大傑出青年 in 2003 and he has 引入「光動力療法」 to cure 黃斑病.