![Can YOU find the hidden letter? Test promises to prove if you have a photographic memory - but only one per cent of people will pass - People's Daily Online Can YOU find the hidden letter? Test promises to prove if you have a photographic memory - but only one per cent of people will pass - People's Daily Online](http://en.people.cn/NMediaFile/2016/0315/FOREIGN201603150125000019161703056.jpg)
Can YOU find the hidden letter? Test promises to prove if you have a photographic memory - but only one per cent of people will pass - People's Daily Online
Red Dot Design Award: Over 92 per cent of the population couldn't pass this colour-blind test. What about you?
![Multiple red spots in cubital fossa showing that Hess's test positive. Dengue hemorrhagic fever Stock Photo - Alamy Multiple red spots in cubital fossa showing that Hess's test positive. Dengue hemorrhagic fever Stock Photo - Alamy](https://c8.alamy.com/comp/2GJEYRP/multiple-red-spots-in-cubital-fossa-showing-that-hesss-test-positive-dengue-hemorrhagic-fever-2GJEYRP.jpg)
Multiple red spots in cubital fossa showing that Hess's test positive. Dengue hemorrhagic fever Stock Photo - Alamy
![Congo Red Dot Paper Test for Antenatal Triage and Rapid Identification of Preeclampsia - eClinicalMedicine Congo Red Dot Paper Test for Antenatal Triage and Rapid Identification of Preeclampsia - eClinicalMedicine](https://els-jbs-prod-cdn.jbs.elsevierhealth.com/cms/attachment/31c3c0e2-10fd-4038-a3a6-180373f9d4f2/gr3.jpg)
Congo Red Dot Paper Test for Antenatal Triage and Rapid Identification of Preeclampsia - eClinicalMedicine
![Red-dot card test of the paracentral field as a screening test for optic nerve disease in onchocerciasis. Red-dot card test of the paracentral field as a screening test for optic nerve disease in onchocerciasis.](https://apps.who.int/iris/bitstream/handle/10665/264121/PMC2486794.pdf.jpg?sequence=3&isAllowed=y)
Red-dot card test of the paracentral field as a screening test for optic nerve disease in onchocerciasis.
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a) Red dot perimetry chart (in grayscale) result of the patient who... | Download Scientific Diagram
![The Latest Viral Optical Illusion Can Actually Tell You Something About How Good Your Vision Is | SELF The Latest Viral Optical Illusion Can Actually Tell You Something About How Good Your Vision Is | SELF](https://media.self.com/photos/57d89233f71ce8751f6b4c28/2:1/w_1280,c_limit/Screen-Shot-2016-04-05-at-1.57.02-PM.png)
The Latest Viral Optical Illusion Can Actually Tell You Something About How Good Your Vision Is | SELF
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