Eye Health: Common Concerns About Vision and Allergies

Q: Eye Health: Common Concerns About Vision and Allergies

Hello Yang Yang： If both people saw it, I believe it is indeed a real phenomenon with shadows flickering. <br>The blood streaks are just blood vessels, which are normally present. <br>During allergic inflammation or when feeling fatigued, they can become more congested and thus m

The area around the eyes and the sclera (the white part of the eye)?

Hello, doctor.
I have two questions.
My brother and I were watching the news when we suddenly saw a black flash.
I thought I was seeing things, but my brother saw it too.
It was during a segment showing something like surveillance footage, but the news didn't replay it.
My mom said that our eyes must be damaged from playing video games all afternoon, but my dad thinks it was just a brief black shadow in the surveillance footage.
I want to ask the doctor if our eyes are really damaged, or if my mom is just trying to scare us.
The second question is that my school said I have myopia and should see an eye doctor, but the doctor didn't say I need to wear glasses.
However, sometimes my eyes feel dry and itchy, so I got some eye drops.
I'm curious why the white part of my eyes sometimes has blood vessels when I have allergies, when I rub my eyes, or when I don't get enough sleep.
There are some sensations I feel regularly, but the doctor only told my mom and me that it's nothing to worry about.
Will those blood vessels disappear on their own, or do I need to sleep more for them to go away? Thank you.

Yangyang, 10~19 year old female. Ask Date: 2020/06/26

Dr. Gao Pilin reply Ophthalmology

Hello Yang Yang: If both people saw it, I believe it is indeed a real phenomenon with shadows flickering.
The blood streaks are just blood vessels, which are normally present.
During allergic inflammation or when feeling fatigued, they can become more congested and thus more noticeable.
They do not disappear; they simply become less prominent.
In Taiwan, the ophthalmology department at Puzi Hospital is open on Monday, Tuesday, Thursday, and Friday mornings from 8:00 AM to 12:00 PM, and on Wednesday afternoons from 2:00 PM to 4:30 PM.
Online responses can only serve as a reference; if necessary, it is still important to seek medical attention at a healthcare facility.
I hope to have the opportunity to assist you.
Gao Pilin

Reply Date: 2020/06/26

More Info

Hello! Thank you for your questions regarding eye health and concerns about vision and allergies. Let's address each of your concerns in detail.

Firstly, regarding the sudden appearance of black flashes in your vision, this phenomenon is known as "photopsia." It can occur for various reasons, including eye strain, especially after prolonged periods of screen time, or it could be related to the visual display you were watching. If both you and your brother saw the same flash, it is less likely to be a problem with your eyes and more likely related to the content being displayed. However, if you experience this frequently or if it is accompanied by other symptoms such as persistent floaters, blurred vision, or a curtain-like shadow in your field of vision, it is essential to consult an eye care professional. They can perform a thorough examination to rule out any serious conditions, such as retinal detachment or other retinal issues.

Now, concerning your second question about the redness in the whites of your eyes (sclera) and the presence of blood vessels, this can be attributed to several factors. Allergies, dryness, and lack of sleep can all cause the blood vessels in your eyes to become more prominent, leading to a red or irritated appearance. When you rub your eyes, it can exacerbate this redness, as it can cause irritation and inflammation.
If your eyes feel dry and itchy, it's possible that you are experiencing allergic conjunctivitis, which is common among individuals with allergies. The use of lubricating eye drops can help alleviate dryness and irritation. However, if you are using medicated eye drops, it’s important to follow your doctor's instructions regarding their use.
Regarding the bloodshot appearance of your eyes, it is generally not a cause for concern if it resolves on its own. Adequate sleep, hydration, and minimizing eye strain can help improve the appearance of your eyes. If you notice that the redness persists or worsens, or if you experience discomfort, it would be wise to revisit your eye doctor for further evaluation.

In summary, while occasional flashes of light or redness in the eyes can be concerning, they are often benign and related to environmental factors or temporary conditions. Maintaining good eye hygiene, taking regular breaks from screens, and ensuring you get enough rest can significantly improve your eye health. If symptoms persist, do not hesitate to seek professional advice from an eye care specialist. They can provide tailored recommendations based on your specific situation and help ensure your eyes remain healthy.
Take care of your eyes, and remember that regular eye check-ups are essential for maintaining good vision and overall eye health!

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