Blue Light Perception and Glaucoma Symptoms

Blue light from lighting peripherals

Hello Doctor: I was recently diagnosed with glaucoma, but I still have some questions that my treating physician did not address.

1.
When I look at bright lights (especially very bright ones), I notice a blue halo around the edges of the light.
Is this a symptom of glaucoma?
2.
At night, when I look at streetlights from a distance (for example, 200-300 meters away), the color of the distant lights appears different from the nearby ones.
However, as I approach the distant streetlight, the color of the light seems to match that of the nearby streetlights.
Is this a phenomenon associated with glaucoma? Additionally, I have noticed that the light from streetlights illuminating the ground (or objects) shows different colors; some areas appear yellow while others look normal.
Is this also a symptom of glaucoma? I am concerned about the possibility of other complications.

3.
Lastly, after using the eye drops, my intraocular pressure was measured at 15 and 16.
Does this indicate that my pressure is under control, or should it be lowered further to 11 or 12? Thank you for clarifying these concerns.

Xiao Y, 30~39 year old female. Ask Date: 2016/11/15

Dr. He Jianxian reply Ophthalmology

Your intraocular pressure is currently within the normal range.
Unless there is further deterioration in the visual field examination, there is no need for additional measures to lower the eye pressure.
As for the blue light you are seeing, it is likely unrelated to glaucoma.
However, I am unable to explain how this phenomenon occurs due to limitations in my knowledge.

Reply Date: 2016/11/15

More Info

Understanding the symptoms and implications of glaucoma, especially in relation to light perception, is crucial for managing this condition effectively. Let's address your questions one by one.

1. Blue Light Perception: The perception of blue light around bright lights can be associated with several factors, including the effects of glare and halos, which are common visual disturbances in individuals with glaucoma. This phenomenon can occur due to changes in the cornea or lens, which may be exacerbated by the increased intraocular pressure characteristic of glaucoma. While blue light perception itself is not a direct symptom of glaucoma, it can indicate that your eyes are experiencing stress or strain, potentially due to the condition. It's essential to discuss these visual disturbances with your ophthalmologist, as they can provide insights specific to your situation.

2. Color Perception of Distant Lights: The variation in color perception of distant versus nearby lights can be attributed to several factors, including atmospheric conditions, light scattering, and the way your eyes adjust to different distances. In glaucoma, changes in the optic nerve and visual pathways can affect how you perceive colors and contrasts, especially in low-light conditions. The phenomenon of lights appearing different at various distances is not exclusive to glaucoma but can be more pronounced in individuals with visual impairments. If you notice significant changes in your vision, particularly in low-light situations, it is advisable to consult your eye care professional.

3. Variations in Light Color: The observation of different colors in the light cast by street lamps can also be influenced by the type of light bulb used (e.g., LED, sodium vapor) and the surrounding environment. However, if you are experiencing significant variations in color perception or if certain areas appear unusually colored, it could be related to how your eyes are processing visual information due to glaucoma. Again, this is something that should be discussed with your doctor, as they can evaluate whether these changes are related to your condition or if they might indicate other issues.

4. Intraocular Pressure (IOP) Management: Regarding your eye pressure readings of 15 and 16 mmHg after using your prescribed eye drops, these values are generally considered within the normal range for many individuals. However, the target IOP can vary based on individual circumstances, including the severity of your glaucoma and any damage to the optic nerve. Some specialists aim for a lower target pressure (e.g., 11-12 mmHg) to prevent further progression of the disease, especially if there is significant optic nerve damage. It is crucial to have a personalized treatment plan, so discussing your specific target IOP with your ophthalmologist is essential.

In summary, while some of the visual phenomena you are experiencing may relate to glaucoma, they can also be influenced by other factors. Regular follow-ups with your eye care provider are vital to monitor your condition and adjust treatment as necessary. Understanding your symptoms and how they relate to your overall eye health will empower you to manage your glaucoma effectively and maintain your quality of life. Always feel free to ask your doctor any questions or express concerns about changes in your vision, as they are there to help you navigate this condition.

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