Optometrists Dhruvin Patel and Asad Hamir have come up with a line of anti-blue light glasses, screen protectors and lamps to help prevent eye discomfort during long periods of looking at screens. They're seeking an investment of £75,000 in exchange for a 5% stake in their tech business, Ocushield.

Season 18, Episode 13

An international sensation, Dragon's Den features entrepreneurs pitching for investment in the Den from our Dragons, five venture capitalists willing to invest their own money in exchange for equity.

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