cylindrical power causes

Cylindrical power in your eyeglass prescription relates to astigmatism, which is a common refractive error. Essentially, it means that instead of your cornea being perfectly round, it’s more oval-shaped, leading to blurred or distorted vision at all distances. Indeed, genetics can play a significant role in astigmatism, so it’s not surprising that your dad has it too. While lifestyle factors like prolonged screen time can contribute to eye strain and discomfort, they don’t typically cause astigmatism itself. The symptoms you’re experiencing, such as blurry vision and eye strain, are quite typical for astigmatism and can be effectively corrected with glasses or contact lenses that have cylindrical correction. In some cases, laser surgery might be an option, but that’s something you would need to discuss specifically with an ophthalmologist. To manage your current symptoms, I’d recommend taking regular breaks using the 20-20-20 rule: every 20 minutes, look at something 20 feet away for at least 20 seconds. This practice can help reduce the digital eye strain associated with prolonged screen use but won’t change the astigmatism. It’s always worthwhile maintaining a well-balanced lifestyle including a diet rich in vitamins beneficial for eye health and ensuring you have sufficient lighting when reading or using screens. If your symptoms persist or worsen, make sure to follow up with an eye care professional to ensure you have the appropriate eyewear and any further treatment if needed.