Baidu Encyclopedia explains that synaesthesia is to communicate the feelings of different senses, cause the transfer of feelings through association, and "write feelings with feelings". Communication between various sensory organs in literary creation and appreciation. It means that vision, hearing, touch, smell and other functions can communicate, regardless of boundaries. It is a physiological and psychological phenomenon that people have, and it is also inseparable from the cultivation of people's social practice. In synaesthesia, color seems to have temperature, sound seems to have image, and cold and warm seems to have weight. Say "bright" and "loud", as if vision and hearing are interlinked, such as "lively" and "calm", and feeling and hearing are interlinked. In modern psychology or linguistics, these are all "synaesthesia".
For example:
"The moonlight in the pond is uneven, but the light and shadow have a harmonious melody, such as the famous song played on the Van Aling." (Zhu Ziqing's Moonlight on the Lotus Pond)
This is a visual transplant of hearing.
What you mean by eyeful fragrance can be understood as synaesthesia of sight and smell.
In addition, incense can also refer to fragrant flowers and trees. Just like the red scarf refers to the young pioneers, it belongs to the characteristics.
Finally, I think he made a mistake. Originally, I wanted to write full garden fragrance, but I used the word "garden" in front of it and changed it.