Ophthalmologist Sino Goiziev has warned against using sunglasses that lack UV protection, emphasizing that choosing inappropriate eyewear can cause severe damage to the eyes. He explained that the effects of UV rays accumulate gradually, noting that children are the most vulnerable group. He added that direct exposure to sunlight without protection may lead to retinal burns and photokeratitis, as well as long-term damage including cataracts and an increased risk of cancer. He stressed the importance of selecting sunglasses with recognized medical certification marks, warning against dark lenses without protective filters.