Astigmatism Increase: Causes, Concerns, and Eye Health - Ophthalmology

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Astigmatism, or astigmatism increase, is a common refractive error that can significantly impact vision quality. Understanding its causes, concerns, and implications for eye health is essential, especially for individuals who have recently experienced changes in their prescription.

1. Causes of Astigmatism Increase: Astigmatism occurs when the cornea (the clear front surface of the eye) or the lens inside the eye has an irregular shape. Instead of being perfectly round, it may be more oval, leading to blurred or distorted vision. The increase in astigmatism can be attributed to several factors:
- Genetics: A family history of astigmatism can predispose individuals to develop or experience worsening of the condition.

- Eye Strain: Poor reading posture, such as slouching or lying down while using a smartphone, can lead to eye strain. This strain may not directly cause astigmatism but can exacerbate existing visual issues, making them more noticeable.

- Environmental Factors: Prolonged exposure to screens without adequate breaks can lead to digital eye strain, which may contribute to discomfort and perceived changes in vision.

- Changes in Eye Structure: As we age, the shape of the cornea can change, leading to an increase in astigmatism. Additionally, conditions such as keratoconus, where the cornea thins and bulges, can also lead to increased astigmatism.

2. Concerns About the Rate of Increase: An increase in astigmatism, such as from 150 to 225, can be concerning, especially if it occurs rapidly. While some fluctuations in astigmatism are normal, a significant change may warrant further investigation. Since you mentioned that a corneal topography test showed no abnormalities, this is a positive sign. However, if you notice other symptoms such as significant visual distortion, discomfort, or changes in vision quality, it would be prudent to follow up with an eye care professional for a comprehensive examination. Regular check-ups can help monitor any changes and ensure that your eye health remains stable.

3. Impact of Dry Eye and Allergies: Conditions like dry eye syndrome and allergic conjunctivitis can indeed affect your overall eye health and may contribute to visual disturbances. Dry eyes can lead to fluctuating vision, which might make astigmatism appear worse at times. Allergies can cause inflammation and irritation of the eyes, potentially affecting the cornea's shape and leading to temporary changes in vision. Managing these conditions through appropriate treatments, such as artificial tears for dry eyes and antihistamines for allergies, can help improve your overall comfort and visual clarity.

In summary, while an increase in astigmatism can be concerning, it is essential to consider the broader context of your eye health. Factors such as genetics, environmental influences, and existing conditions like dry eye and allergies can all play a role. Regular eye examinations and open communication with your eye care provider are crucial for monitoring changes and ensuring that your vision remains as clear and comfortable as possible. If you have any further concerns or notice additional symptoms, do not hesitate to seek professional advice.