Skiascopy (retinoscopy) in Moscow
Vision can change throughout the day: after reading, studying, or working on a screen, clarity often decreases. A chart test helps assess visual acuity, but it doesn't always reveal why the eye is having trouble maintaining focus.
At K+31 in Moscow, skiascopy is performed when the doctor needs to objectively evaluate the refraction of the eye and determine whether the patient needs correction.
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In what cases do we recommend skiascopy?
We prescribe an examination when a chart or device printout alone is not enough. It is important for the patient to understand why their vision has become less clear. Therefore, the ophthalmologist evaluates the results in the context of the examination.
Most often, an examination is necessary in several situations:
- There is a suspicion of nearsightedness, farsightedness, or astigmatism
- A child is undergoing a vision test
- An initial or repeat fit of glasses is needed
- The device data does not match the patient's complaints
- There are signs of accommodation strain
After this, the doctor clarifies the cause of the complaints. If necessary, other methods are added to the examination.
Suspected nearsightedness, farsightedness, or astigmatism
Myopia causes difficulty seeing distant objects. Farsightedness often causes strain when looking up close. Astigmatism often causes blurred edges and fatigue.
This method helps determine the direction and severity of the optical error. The doctor evaluates each eye separately, the difference between the eyes, and the cylindrical component.
Vision examination in children
A routine eye test for a child does not always reflect the real picture. Children may guess symbols, become tired, or answer unsurely. Therefore, the pediatric ophthalmologist uses objective methods.
In pediatric ophthalmology, accommodation is important - the ability of the eye to change focus. If it is overly active, the data may be unstable. According to indications, the doctor applies cycloplegia - temporarily relaxes accommodation with drops.
Eyeglasses Selection and Refractive Impairment
Eyeglasses cannot be selected based solely on an automatic printout. The doctor checks:
- Lens Tolerance
- Distance and Near Clarity
- Both Eyes Working Together
Therefore, refraction determination must be based on actual visual load.
This examination provides an objective basis for further fitting. Trial lenses, visometry, and other tests are then performed. This way, the doctor understands which vision correction is safe.
If the patient already wears glasses, the doctor compares the new data with the previous prescription. A sudden change in lens strength without checking tolerance can cause fatigue, so the final correction is selected in stages. Tolerance monitoring is especially important with the first prescription.
General information
How Skiascopy is Performed at K+31
At our clinic, the examination is performed in the ophthalmologist's office. The patient sits in front of the doctor and looks in a designated direction. The specialist illuminates the pupil, observes the shadow, and refines the data with lenses.
Preparing for the Examination
Usually, no special preparation is required. It's best to bring your current glasses or contact lens prescription, as well as previous examination results, to your appointment. This will make it easier for the doctor to monitor your progress.
If drops are planned, the doctor explains their purpose in advance. After the pupil is dilated, near vision may become blurry and light may become brighter. It's best to drive after vision clarity is restored.
Procedure Steps
First, the doctor clarifies the patient's complaints:
- When does vision clarity decrease?
- Are you experiencing fatigue?
- Are you experiencing headaches, double vision, or difficulty reading?
Then a basic vision diagnosis and the examination itself are performed.
The doctor observes the shadow in the pupil and selects lenses until it is neutralized. This is how the refraction of each eye is analyzed. If necessary, the examination is repeated after the drops.
What the result shows and how we interpret it
The result shows how the eye's optical system refracts light. The doctor sees the magnitude of the error, the direction of the change, the difference between the eyes, and signs of the astigmatic component.
We explain the results without complex formulations. The patient understands which data are significant, whether correction is needed, and why additional tests are sometimes needed.
Frequently Asked Questions about Skiascopy
What is skiascopy and how does it differ from autorefractometry?
Is there any preparation required for the test?
Is the test performed on children?
Are there any contraindications or restrictions after the procedure?
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What is skiascopy and why is it needed?
Skiascopy is an objective method for assessing refraction based on observing the movement of a shadow in the pupil. Therefore, the test is also called a shadow test. The doctor shines a light into the eye and observes which lenses neutralize the shadow.
Retinoscopy helps identify refractive errors: myopia, hyperopia, and astigmatism. This method is useful for children, with inconsistent results, and with questionable instrument data. The results are always compared with the patient's complaints, age, accommodation, and other tests.