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Our eyes (1) ....... the most important of our five senses . We receive 80% of our information (2) ........ the world through our (3) ....... . We also send signals to other (4) ....... with our eyes . Some eyes signals are unconscious . When we look (5) ........ something nice , our pupils dilate . We cry when we are (6) ....... and sometimes we are very happy . But we can also control some eye (7) ...... . For example , we can wink at someone or raise an eyebrow . Sunglasses (8) ....... someone appear mysterious or dangerous , because they (9) ....... the eyes and so we can't (10) ....... the signals .