Melanoma, a skin cancer with clear warning signs, is not just a concern for your skin. But here's where it gets surprising: it can also affect your eyes, and it's not always related to sun exposure.
The telltale signs of melanoma include new or changing moles, rough skin patches, and alterations in skin color. While these lesions typically appear on the skin, they can also develop in an unexpected place—the eyes. Yes, you read that right!
The eyelids, thin and vulnerable to UV radiation, are a common site for melanoma. However, melanoma can originate inside the eye itself, a condition known as ocular melanoma. This form of melanoma has several subtypes, such as uveal melanoma and conjunctival melanoma, each with its own characteristics.
The skin and eyes share melanocytes, cells responsible for producing melanin, the pigment that gives color to our skin, eyes, and hair. When these cells are damaged or mutated, melanoma can occur. Interestingly, while sun exposure is a common cause of skin melanoma, uveal and conjunctival melanoma are not primarily linked to UV light.
Instead, individuals with lighter eye colors or pre-existing eye conditions like nearsightedness might be at a higher risk. As melanoma and skin cancer rates rise across the US, eye doctors emphasize the importance of regular eye exams every one to two years. They urge people to watch for subtle changes like blurred vision, spots, and irritation in or around the eyes.
Dr. Jacqueline Bowen, an eye specialist, highlights the various ways skin cancer can affect the eye. It can originate in or around the eye or spread to the eye from other parts of the body. With approximately 1 million Americans living with melanoma and 212,000 new diagnoses expected this year, the disease's impact is significant.
The mortality rate from melanoma in the US is around 2 per 100,000 people, resulting in 8,000 deaths annually. And the numbers are rising; melanoma diagnoses have surged over the past three decades. The American Academy of Dermatology reports a doubling of melanoma cases from 1982 to 2011 and a 31.5% increase between 2011 and 2019.
Age and gender play a role, too; women over 50 have seen a 3% annual increase in melanoma rates, while men under 50 have experienced a 1% yearly decrease. Rates among women under 50 and men over 50 have remained relatively stable.
Uveal and conjunctival melanoma, subtypes of ocular melanoma, typically show no early symptoms. However, as the disease advances, patients may notice blurry vision, floaters, or flashes, and changes in pupil shape. Experts believe that people with lighter eyes and skin are more susceptible, but the exact causes remain a mystery.
The Melanoma Research Foundation estimates around 2,000 new cases of ocular melanoma annually. Conjunctival melanoma, affecting the clear tissue over the eye, is incredibly rare, with approximately 130 cases in the US each year and fewer than one in a million worldwide. Symptoms include irritation, redness, and a feeling of something stuck in the eye, progressing to vision loss, blurry vision, or altered pupil size.
Uveal melanoma, the most common eye cancer, originates in the eye's middle layer, the uvea. Like other eye melanomas, its causes are unclear, and it is not believed to be influenced by UV light. Dr. Bowen emphasizes the importance of annual comprehensive eye exams, as serious eye cancers like uveal melanoma often show no symptoms in the early stages.
These exams can detect tiny precancerous and cancerous lesions, leading to better outcomes. While there is no cure for ocular melanoma, specialized laser therapy or plaque brachytherapy can treat the tumor. Patients are considered NED (no evidence of disease) after treatment, but ongoing monitoring is essential.
Dr. Bowen encourages anyone experiencing eye or vision changes to consult an eye doctor promptly, especially if symptoms persist or worsen. Early detection is crucial, even in children, as rare but serious eye cancers like retinoblastoma can be identified through comprehensive eye exams.
And here's the controversial part: Should people with lighter eye colors be more concerned about eye melanoma? Are regular eye exams sufficient, or should we be doing more to prevent and detect this silent threat? Share your thoughts in the comments below!
