How to read a hospital vision examination report

Oct 26, 2023 Source: Cainiu Health

Dr. Wang Shuai

Introduction

The hospital vision examination report includes indicators such as spherical power, cylindrical power, astigmatism axis, pupillary distance, and interpupillary distance. The spherical power, denoted by "S," indicates whether the patient is nearsighted or farsighted. A negative value indicates myopia, meaning the eye sees nearby objects more clearly, while a positive value indicates hyperopia, meaning the eye sees distant objects more clearly. The normal range for spherical power is from 0 to +50 degrees.

In general, a hospital vision examination report includes indicators such as spherical power, cylindrical power, astigmatism axis, pupillary distance (PD), and eye distance. The specific analysis is as follows:

1. Spherical Power: Spherical power indicates whether the patient has myopia or hyperopia, denoted by "S". A negative value indicates myopia, meaning the eye sees nearby objects more clearly, while a positive value indicates hyperopia, meaning the eye sees distant objects more clearly. The normal range for spherical power is from 0 to +50 degrees.

2. Cylindrical Power: Cylindrical power indicates the presence of astigmatism and is denoted by "C". It is usually measured together with spherical power. It reflects focal differences in a particular direction caused by irregularities in the shape of the cornea or lens. Positive and negative values indicate astigmatism in different directions. The normal range for cylindrical power is less than 50 degrees.

3. Astigmatism Axis: This refers to the direction of astigmatism associated with the cylindrical power. It is expressed in degrees, typically ranging from 0 to 180 degrees, indicating the angle at which cylindrical correction is needed.

4. Pupillary Distance (PD): PD is the distance between the centers of the pupils of the two eyes. This measurement ensures that properly fitted lenses are made according to the patient's facial structure.

5. Eye Distance: Eye distance refers to the distance between the centers of the two lenses on eyeglass or sunglass frames. This measurement ensures correct lens placement within the frame.

If conditions such as myopia, hyperopia, or astigmatism are present, it is recommended to seek medical treatment promptly to avoid adverse effects.

View All

How to read the prescription values on an eye examination report

To analyze a vision examination report, first distinguish between the left and right eyes, then determine whether the values represent uncorrected (naked eye) vision or corrected vision. For uncorrected visual acuity, simply refer to the numerical values; for corrected vision, you should also examine the values for spherical correction (sphere), astigmatism (cylinder), and axis. Vision examination reports are crucial for assessing eye conditions and prescribing eyeglasses. If you require such an evaluation, it is generally recommended to go directly to a正规 hospital to ensure accuracy and avoid errors in results.