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Is my blood sugar level at 140 worsening my stigmatism?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I just got a new pair of glasses. The eye doctor told me that my astigmatism has worsened slightly and gave me a stronger prescription. I went to urgent care, and they said I have a sinus infection. Today, I noticed very slight flashing in both eyes. The doctor checked my blood sugar, and it was 140. I have been off all of my diabetic medications for over a year because my A1c dropped from 12 or 13 down to 6.7.

Please help.

Thank you.

Hello,

Welcome to icliniq.com.

I understand your concern.

I am very sorry about your medical condition, and I am glad that you are paying attention to changes in your body system. But do not worry, I am here to take care of you. It is obvious you are paying close attention to your health, and that is important. Let us walk through what’s going on step by step. Here is a summary of what you are dealing with:

1. Stronger glasses prescription due to worsening astigmatism.

2. Sinus infection (currently being treated).

3. Mild flashing in both eyes today.

4. Blood sugar 140 mg/dL(milligrams per deciliter) yesterday, and off diabetic meds for over a year (with previous A1c improvement from 12 to 13 percent to 6.7 percent).

Flashes of light (photopsia) can be a sign of vitreous traction, or in more serious cases, retinal detachment or tear. So if it is both eyes, then it is likely migraine or pressure in the eyes. Sinus infection can cause pressure behind the eyes, headaches, and visual disturbances (especially if it affects the ethmoid or sphenoid sinuses).

Blood sugar of 140 mg/dL, a random blood sugar of 140 is not alarming by itself, but since you have been off medications for a year, stress or infection (like sinusitis) can cause temporary spikes in blood glucose. So, monitor your fasting blood sugar for a clearer picture. However, if you are seeing flashing lights, eye pain, or blurred vision that worsens, the glasses may need re-checking, or the eye might need to be dilated and examined for retinal health. Please take the following for the sinus infection:

  1. Two tablets of Co-amoxiclav 500mg (milligrams) orally three times daily for one week.

I hope this helps.

Kindly follow up if you have more concerns.

Thank you.

Medically reviewed byiCliniq medical review team

Published At October 7, 2025
Reviewed AtOctober 13, 2025

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