Below or less than the usual level of the eyes or vision.
This word is used in medical or technical contexts to talk about things related to eyes or vision.
Examples:
The glasses have a suboptic lens for reading.
Her suboptic vision makes it hard for her to see far away.
The doctor said I have a suboptic condition.
The suboptic glasses help me see better up close.
The suboptic camera can see things that are very small.
The suboptic test showed that my eyes are not working well.