Blurry Vision: When to Update Your Prescription

Q: Blurry Vision: When to Update Your Prescription

Hello JJ： 1. <br>Cataracts can be examined without dilation. <br>2. <br>If you have difficulty seeing at a distance, you can use the prescription obtained after dilation to get a pair of glasses, but for near vision, you can reduce the prescription by about two diopters, or you c

Blurred vision and corrective lenses?

Hello Doctor: I have dry eye syndrome and have my retina checked every six months.
In 2008, I got glasses with prescriptions of R1000 and L850.
However, after less than a year of working on the computer, my prescription increased by 100 degrees to R1100 and L950.
Since it did not affect my daily life, I did not change my glasses.
Last year, I changed jobs and due to excessive eye strain, my prescription increased by 200 degrees within six months.
I have difficulty seeing people clearly at the other end of the room.
After dilation, my computer prescription was R1300 and L1150.
Because my job requires me to verify data on the computer all day, the doctor advised me not to change my glasses.
Last month, while working, my right eye suddenly felt dry and sore, and whenever I looked at the computer, my vision became blurry.
This week, I went to the hospital for a check-up, and the doctor said it might be due to dry eye inflammation and prescribed eye drops and ointment.
After dilation this time, my computer prescription was R1225 and L1075.

I would like to ask the doctor:
1.
Is a non-dilated examination accurate for detecting cataracts? (Because that day, the doctor checked my lens directly after I mentioned my blurry vision and said there was no posterior capsule opacification, and later I had to dilate for a retinal examination.)
2.
My current glasses are still R1000 and L850; should I get a new prescription? (I find it unclear to read subtitles on the TV from 2 meters away, and faces from 4 meters away are also unclear.
I am unsure if this is due to insufficient prescription or if the lens coating has cracks or wear.)
3.
During the vision test, do I need to see the E clearly to count it as correct, or is it sufficient to vaguely see where the gap is? (Because I was guessing which side of the small black square had the gap, and my original glasses showed a vision of 0.5 to 0.6.)
Thank you, doctor, for taking the time to answer my questions.

JJ, 30~39 year old female. Ask Date: 2016/06/09

Dr. Gao Pilin reply Ophthalmology

Hello JJ: 1.
Cataracts can be examined without dilation.
2.
If you have difficulty seeing at a distance, you can use the prescription obtained after dilation to get a pair of glasses, but for near vision, you can reduce the prescription by about two diopters, or you can use your current glasses.
3.
You only need to be able to discern the images vaguely, but it must be accurate.
At Taiwan E-Hospital Puzi Hospital Ophthalmology: Monday to Friday from 8:00 AM to 12:00 PM and Wednesday from 1:00 PM to 4:30 PM.
Online responses can only serve as a reference; if necessary, you should visit a medical facility for treatment.
I hope to have the opportunity to serve you.
Gao Pi-Lin

Reply Date: 2016/06/09

More Info

Hello! Thank you for your detailed inquiry regarding your vision issues, particularly in relation to your dry eyes and the changes in your prescription. It sounds like you are experiencing a complex set of symptoms, and I appreciate your thoroughness in describing your situation. Let’s address your questions one by one.

1. Accuracy of Non-Dilated Eye Exams for Cataracts: Non-dilated examinations can sometimes miss subtle cataracts, especially in the early stages. However, if your doctor specifically checked for posterior capsule opacification (a common type of cataract) and found none, that is a good sign. Dilated exams provide a more comprehensive view of the retina and lens, allowing for better detection of cataracts and other potential issues. If you have concerns about cataracts or other eye conditions, it might be worthwhile to have a follow-up appointment for a dilated exam.

2. Need for New Glasses: Given that your vision has changed significantly (from R1000, L850 to R1225, L1075), and considering your difficulties in seeing clearly at distances of 2 meters and beyond, it is advisable to update your prescription. The fact that you are experiencing discomfort and visual disturbances, particularly with prolonged computer use, suggests that your current glasses may no longer be adequate. Additionally, if your lenses are scratched or damaged, that could further impair your vision. It’s best to consult with your eye care professional about getting a new prescription that reflects your current visual needs.

3. Understanding Visual Acuity Tests: During a visual acuity test, the goal is to see the letter clearly enough to identify it. If you can see the "E" and recognize its orientation, even if it’s not perfectly clear, that is generally acceptable. However, the standard is to see the letter distinctly. If you are only seeing a vague outline or can’t confidently identify the orientation of the "E," that may indicate a need for a stronger prescription. The results you mentioned (0.5 to 0.6) suggest that your vision is not at optimal levels, and this could be contributing to your discomfort and difficulty focusing.

Additional Considerations
Given your history of dry eyes and the recent increase in your prescription, it’s essential to manage your dry eye condition effectively. Dry eyes can lead to visual disturbances, including blurred vision and discomfort, especially during prolonged screen time. Here are some strategies to consider:
- Artificial Tears: Regular use of preservative-free artificial tears can help alleviate dryness and improve comfort while working at the computer.

- Screen Time Management: Implement the 20-20-20 rule: every 20 minutes, take a 20-second break and look at something 20 feet away. This can help reduce eye strain.

- Humidity and Environment: Ensure that your workspace is well-humidified, as dry air can exacerbate dry eye symptoms.

- Consultation with an Eye Specialist: If your symptoms persist despite these measures, consider seeing a specialist who can evaluate your dry eye condition more thoroughly and discuss potential treatments, such as punctal plugs or prescription medications.

In summary, it seems prudent to update your glasses prescription based on your current visual needs and to continue managing your dry eye symptoms. Regular follow-ups with your eye care provider will help ensure that any changes in your vision are monitored and addressed promptly. Thank you for reaching out, and I hope this information helps clarify your concerns!

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