【新冠肺炎】嶺大調查：逾6成大專生網上學習效果比面授差　學生長時間觀看屏幕致眼睛疲勞 LU study reveals over 60% of Hong Kong university students have found online learning not as effective as face-to-face teaching during COVID-19 pandemic; students suffer from eye fatigue due to long screen time