It's been announced that Hinatazaka46 member Matsuda Konoka will be focusing on treatment for an eye-related illness. 

On the group's official website, it states, "Regarding Matsuda Konoka, she has been seeing a doctor since last week for an eye-related illness, and she has already started treatment. To be careful, she will be devoting herself to treatment for the time being. She will be positively tackling treatment in order to appear in front of her fans as soon as possible."

Source & Image: Model Press