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School boy writing in a notebook. Pupil solving task in class lesson with teacher's help. Teacher and student hands on a school desk.
close up in the children's room a schoolboy in white sweater and a blue checkered shirt lies on a desk behind his head a difficult task children's suffering distressed feelings
Experienced female optometrist measuring pupil distance for her senior men patient. She is using manual pupillometer.
Tired child student learning, sad boy doing difficult homework at home. Frustrated sleepy schoolboy sitting at table with paper books, notebooks and tablet to study. Education problems, stress concept
Patient, paramedic and shine light into eyes to check pupil, test and first aid. Hands, medical professional and flashlight to woman, unconscious and rescue for health, emergency or help in ambulance

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