Decompensation
Decompensation is the moment at which a compensatory mechanism stops being enough — a system that until then coped with some abnormality without symptoms loses control of it, and complaints appear.
In the context of vision the term most often refers to a latent squint. Holding the eyes in the correct position against their natural tendency requires constant effort, although an entirely unconscious one. As long as the reserve of that effort is sufficient, nothing happens. When it shrinks, symptoms begin to appear.
The typical circumstances in which this happens: prolonged close work, exhaustion, illness, stress, lack of sleep and, in children, the sudden increase in visual load brought by the start of the school year.
The symptoms are often non-specific and easy to attribute to something else: headaches towards the end of the day, fatigue when reading, losing one's place in a line of text, letters blurring from time to time, reluctance to take on tasks that require looking up close. Collectively they are described as asthenopic symptoms.
What is important is that decompensation does not mean that eyesight itself has got worse. Visual acuity may stay the same — what changes is how much work it costs to maintain a correct, single image.
A decompensated latent squint is one of the situations in which the guidelines allow the use of prismatic correction as an alternative to surgery.
How does it work in ocu•vio?
Fatigue symptoms after a day of close work are always worth showing to a specialist — ocu•vio does not assess them and does not replace an examination. Our missions concern only everyday habits in front of a screen: breaks, looking into the distance and a calmer rhythm of close work.
Frequently Asked Questions
Does decompensation mean that a child sees worse?
Not necessarily. Visual acuity may stay the same — what changes is how much effort it costs to maintain a correct, single image.
What most often triggers it?
Prolonged close work, exhaustion, illness, stress and lack of sleep, and in children also the sudden increase in visual load at the start of the school year.
What are asthenopic symptoms?
It is a collective name for fatigue complaints: headaches towards the end of the day, fatigue when reading, losing one's place in a line of text, letters blurring from time to time, and reluctance to take on tasks that require looking up close.
Do such symptoms always mean decompensation?
No — they are non-specific and may have other causes. This is settled by an examination with a specialist, not by observation at home.
Related concepts
Source: Polish Ophthalmological Society, Section of Paediatric Ophthalmology and Strabismus, Wytyczne postępowania w zezie [Guidelines on the management of strabismus], 2021.
Return to the glossary of termsThis dictionary entry serves an exclusively educational purpose. The ocu•vio platform is not a medical device as defined by legal regulations — it does not diagnose, treat, or correct vision defects or eye diseases. Digital missions and PDF materials serve a recreational and relaxing function, supporting daily digital hygiene and healthy screen habits. The content of the dictionary does not replace consultations with a specialist.