A Confirmation study on the effect of VUP intake on visual function in healthy adults

INTERVENTION: 4‐weeks Intake I period (test food) ‐ washout period ‐ Intake II period (placebo). 4‐weeks Intake I period (placebo) ‐ washout period ‐ Intake II period (test food). CONDITION: Healthy subjects PRIMARY OUTCOME: Objective refraction SECONDARY OUTCOME: (Secondary evaluation item); Axis length,Subjective symptoms(VAS values),Choroid thickness,Impression questionnaire; (Safety evaluation items); Vital signs, biochemistry tests, hematological tests, urinalysis, slit lamp, intraocular pressure tests, OCT tests (fundus), adverse events, side effects INCLUSION CRITERIA: