Does using mobile phones in the dark cause eye cancer?

mobile phone
Is there a link between using mobile phones and eye Cancer?
There is no definitive evidence that suggests that using mobile phones in the dark causes eye cancer. Research has found that the light from mobile phones when used excessively in the dark causes symptoms such as eye strain, discomfort, dry eye, blurry vision, double vision, burning or stinging and foreign body sensation but not eye cancer.

Eye cancer, also known as ocular cancer or intraocular cancer, refers to the development of abnormal cells in the eye. It is a rare form of cancer that can affect different parts of the eye, including the outer surface (conjunctiva), the inner lining (retina), the iris, the lens, or the tissues around the eye. Retinoblastoma, Melanoma, Lymphoma, and Squamous cell carcinoma are types of eye cancer, each with its own characteristics and treatment options. In this article, we will discuss whether using mobile phones in the dark causes eye cancer.

Does using mobile phones in the dark cause eye cancer?

No. There is no evidence to suggest that using mobile phones in the dark causes eye cancer. However, using mobile phones in the dark, specifically in terms of lighting conditions, can have some effects on your eyes. When using a mobile phone or any electronic device with a bright screen in a dark environment, the contrast between the bright screen and the surrounding darkness can cause eye strain and discomfort. This is because your eyes have to constantly adjust between the bright screen and the dark background.

A (2019) study published in the NATURE journal only suggests that excessive use of smartphones is linked to problems like eyestrain, dry eye, blurry vision, double vision, and eye discomfort.

A (2021) study published in BMC Ophthalmology has recorded symptoms of ‘photophobia, tightness or pressure around the eye, eye dryness, foreign body sensation, burning or stinging, blurred vision’, and eye fatigue. However, no study suggests that using a mobile phone in the dark induces eye cancer. Even a (2002) study found no relation between mobile phone use and eye cancer in the selected participants.

The blue light emitted by electronic screens, including mobile phones, can also potentially disrupt your sleep patterns. Exposure to blue light in the evening can suppress the production of melatonin, a hormone that helps regulate sleep-wake cycles. This can make it more difficult to fall asleep and may negatively impact your overall sleep quality.

Is dark mode in mobile phones better for my eyes? 

While dark mode offers several benefits, it may not necessarily be better for your eyes. The dark mode is helpful because it is less straining on the eyes compared to a bright white screen. However, using a dark screen causes your pupils to dilate, which can make it harder to focus on the screen.

The reason why eye dilation affects vision is that when pupils dilate, the vision becomes less clear. On the other hand, when your pupils constrict in response to bright light, your vision becomes sharper. Similar to a camera, a smaller aperture provides better focus depth. This means that some people may find it more challenging to see screen details clearly in dark mode.

For those who already have vision issues, opting for a dimmed light mode or using a mode that filters out blue light may be more beneficial. However, regardless of the mode you choose for viewing your phone, the best way to ensure clear and comfortable vision is to have regular eye exams and maintain an up-to-date vision prescription by visiting an eye doctor.

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