The glamour model was first seen with her hand over her eye as Kim picked a fight with Bianca Gascoigne, who she had nominated for eviction the day before.
Nicola, 35, stepped in telling Kim to leave Bianca alone, while throughout the confrontation, she attempted to keep her right eye covered.
The blonde beauty then stormed into the diary room to vent about the argument and moaned that she wanted to leave the Borehamwood Bungalow.
Viewers of the Channel 5 reality show took to social media to air their concern for Nicola.
Nicola McClean concerned viewers as she kept holding her eye following a row with Kim Woodburn
One person wrote on Twitter: “@NicolaMcLean @nickisaunders74 what actually happened to her eye????”
“What was wrong with @NicolaMcLean eye?? Did anyone notice her holding her eye. Has it fallen out? #CBB,” asked another confused fan.
A third also wondered what had happened: “Why was #nicolamclean covering her eye? Anyone know? #cbb.”
“@NicolaMcLean was holding her eye while arguing with Kim as legend states if you stare into her eyes to turn to stone #cbb #cbbuk #kim,” joked one viewer.
According to the Mirror, the reason behind Nicola covering her eye has been revealed.
A Celebrity Big Brother spokesperson said: “Nicola is absolutely fine. She was trying to remove her contact lenses at the time.
Kim rowed with Nicola and her fellow housemates
Celebrity Big Brother 2017 highlights
Tue, January 17, 2017
Celebrity Big Brother 2017: The best bits from the latest series including all the arguments, kisses and Tony the Pony.
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Celebrity Big Brother viewers were surprised to hear Kim Woodburn urging Chloe Ferry to become an escort
Kim Woodburn had to be removed from the CBB house in the episode
“She was in the middle of doing so when the argument broke out. She was just trying to take out her contacts."
Elsewhere on last night’s main show, security were forced to intervene and remove Kim from the house following a furious row with Jamie O’Hara.
The How Clean is Your House star lashed out at the footballer after he stepped into to defend Nicola and yelled “adulterer” at him.
“You’re a two-faced bunch, chicken-livered s**ts,” she bellowed at Jamie.
Celebrity Big Brother continues tonight on Channel 5 at 9pm.