Can chicken liver prevent night blindness?
Generally, chicken liver may help prevent night blindness when consumed in moderation and if the condition is due to a vitamin A deficiency. However, if night blindness is caused by other underlying conditions or if chicken liver is consumed in excess, it may be ineffective or even potentially harmful. If in doubt, it is advisable to consult a healthcare professional in advance. Detailed explanation is as follows:

If daily intake of vitamin A is insufficient and early symptoms such as blurred vision occur in the evening, moderate consumption of chicken liver to supplement vitamin A, combined with a balanced diet including leafy green vegetables, may aid in preventing night blindness when the body absorbs the nutrients well.
If night blindness is caused by organic diseases such as retinal disorders, or if excessive long-term consumption of chicken liver leads to vitamin A overdose, symptoms may not be prevented and could potentially lead to adverse reactions such as dizziness and nausea.
Intake of chicken liver should be controlled and not relied upon as the sole source of nutrition. If night vision deteriorates, the underlying cause should first be identified. If symptoms do not improve after adjusting the diet, prompt medical evaluation is recommended, and interventions should follow professional medical advice.