Health
Vision Test
Approximate home vision screening using the Snellen tumbling E chart.
⚠️ This is a rough screening tool only. Results depend on screen size, lighting and viewing distance. It does NOT replace a professional eye examination. Consult an eye doctor for accurate results.
This test uses the tumbling E chart. An 'E' will appear in different sizes, rotated in one of four directions.
Khoảng cách mắt tới màn hình
Điện thoại
30–40cm
Duỗi thẳng tay, màn hình đặt ở khoảng cổ tay đến khuỷu tay
Máy tính
50–60cm
Khoảng cách từ lưng ghế tới màn hình, cánh tay duỗi thẳng chạm màn hình
Giữ nguyên khoảng cách trong suốt bài test. Ánh sáng đủ sáng, không chói. Che lần lượt từng mắt để kiểm tra riêng.
Hướng của chân chữ E = hướng bạn chọn
E
→E
↑E
←E
↓Chân chữ E chỉ hướng nào → nhấn mũi tên hướng đó
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