Questions related to refractive error measurements?
Hello Doctor, my vision has not changed since 2016.
My left eye has myopia of -5.50 with astigmatism of -0.75, and my right eye has myopia of -4.75 with astigmatism of -1.00.
Last week, I visited an ophthalmologist and an optical shop for an eye exam, and I have a few questions:
1.
The optometrist said my current prescription is -6.25 for the left eye with no astigmatism and -5.00 for the right eye with astigmatism of -1.00.
The optometrist mentioned that my left eye's previous prescription was also -6.25 with astigmatism, which is similar to the current reading.
Is this correct? Is it not considered a significant increase?
2.
The optical shop indicated that my right eye has increased by 0.25 diopters, while the ophthalmologist stated there has been no change.
How should I proceed with my glasses prescription to ensure it is appropriate? Thank you for your response, Doctor.
Chang, 30~39 year old female. Ask Date: 2023/08/05
Dr. Liang Ce reply Ophthalmology
Recommendations: 1.
Discuss the above situation further with your attending physician.
2.
Alternatively, seek consultation at another ophthalmology clinic.
Thank you.
Wishing you good health!
Reply Date: 2023/08/05
More Info
Hello! It sounds like you have some valid concerns regarding your recent eye exams and changes in your prescription. Let's break down your questions and provide some clarity on the situation.
1. Understanding Changes in Prescription: It's common for individuals to experience fluctuations in their vision over time, especially if they have conditions like myopia (nearsightedness) or astigmatism. The fact that your left eye's prescription has changed from -5.50 (550) to -6.25 (625) indicates an increase in myopia, which is not unusual, especially if you are in an age group where vision changes are more common. The right eye's prescription change from -4.75 (475) to -5.00 (500) also suggests a slight increase in myopia.
The verification of your prescription by different professionals can sometimes lead to confusion. If the optometrist stated that your left eye's total prescription is now 625 and that it was previously the same, it could mean that the astigmatism component has changed or that there was a misunderstanding in the communication of your previous prescription. It’s important to clarify with your eye care provider to ensure that you understand the specifics of your prescription.
2. Discrepancies Between Eye Care Providers: The difference in opinion between the optician and the ophthalmologist regarding the right eye's prescription increase can be attributed to several factors. Variations in measurement techniques, equipment calibration, or even the subjective nature of refraction tests can lead to different results. It’s essential to trust the professional who conducted the most thorough examination. If you feel uncertain, consider getting a third opinion from another eye care professional.
3. Choosing the Right Prescription: When it comes to selecting the appropriate lenses for your glasses, it’s crucial to base your decision on the most accurate and recent prescription. If the ophthalmologist believes that your right eye's prescription has not changed, you might want to consider using that prescription for your new glasses. However, if you are experiencing visual discomfort or difficulty seeing clearly, it may be worth discussing the situation further with your eye care provider to determine the best course of action.
4. Monitoring Your Vision: Given that your vision has not changed significantly over the past several years, it’s a positive sign. However, regular eye exams are essential, especially if you notice any changes in your vision. It’s also important to maintain good eye health through proper eye care practices, such as taking breaks from screens, using appropriate lighting, and wearing protective eyewear when necessary.
5. Addressing Concerns: If you have any ongoing concerns about your vision or the changes in your prescription, don’t hesitate to reach out to your eye care provider. They can provide you with the most accurate information and help you understand the implications of your prescription changes.
In summary, while some changes in your vision and prescription are normal, it’s essential to have clear communication with your eye care providers to ensure you receive the best possible care. If you feel uncertain about your prescription or the recommendations provided, seeking a second opinion can be beneficial. Remember, your eye health is crucial, and staying proactive about your vision care will help you maintain optimal eye health over time.
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