Light Distortion in Myopia: Is It Normal? - Ophthalmology

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When it comes to understanding light distortion in myopia, particularly the phenomenon you are experiencing with streetlights and traffic signals appearing as large, diffuse light balls, it is essential to consider several factors related to your vision condition.

Firstly, myopia, or nearsightedness, occurs when the eye is longer than normal or has a cornea that is too curved. This causes light rays to focus in front of the retina instead of directly on it, leading to blurred vision for distant objects. In your case, with a prescription of 600-700 degrees, it is likely that your eyes are significantly myopic, which can contribute to various visual distortions, especially in low-light conditions.

The phenomenon you describe, where lights appear as large, diffuse balls or clusters, can be attributed to a combination of factors, including myopia, astigmatism, and the optical properties of your corrective lenses. Astigmatism, which you mentioned having a degree of 75, can cause light to scatter in different directions, leading to the perception of lights as elongated or distorted shapes rather than sharp points. This scattering effect is often more pronounced at night or in low-light conditions, which is why you may notice this distortion more when looking at streetlights or vehicle headlights.

Additionally, the quality of your lenses can play a significant role in how light is perceived. If your lenses are not adequately correcting your vision, or if they have imperfections, this can exacerbate the distortion you experience. It is also worth noting that the pupil size changes in different lighting conditions; in low light, the pupils dilate, which can increase the effects of any refractive errors, making lights appear more distorted.

The fact that you do not experience this distortion indoors suggests that the lighting conditions and the distance of the light sources play a crucial role. Indoor lighting is typically more diffuse and evenly distributed, which may not trigger the same optical effects as the more intense and focused light sources found outdoors.

In terms of whether this is normal, it is relatively common for individuals with high myopia and astigmatism to experience such visual distortions, especially in low-light conditions. However, if this phenomenon is new or has changed significantly, it would be wise to consult with an eye care professional. They can perform a comprehensive eye examination to ensure that your prescription is accurate and that there are no underlying issues, such as retinal changes or other ocular conditions that could be contributing to your symptoms.

In conclusion, while the visual distortions you are experiencing can be attributed to your myopia and astigmatism, it is essential to monitor any changes in your vision. Regular eye examinations are crucial for maintaining eye health, especially as you age or if you notice any new symptoms. If you have concerns about your vision or if the distortions become more pronounced, seeking professional advice is always the best course of action.