Small Eye Openings
Eye openings shorter than usual from corner to corner
Quick Facts
- Type: Facial feature / developmental sign
- Medical term: Short palpebral fissures
- Often normal: Eye shape varies naturally
- Notable association: Fetal alcohol spectrum disorders
Overview
Small eye openings, known medically as short palpebral fissures, describe eye openings that measure shorter than average from the inner corner to the outer corner. The palpebral fissure is the visible gap between the upper and lower eyelids, and its length is one of the measurements doctors sometimes use when assessing facial features.
Eye shape and size vary naturally across people, families, and ethnic backgrounds, so small eye openings are frequently just a normal trait. In certain situations, however, shorter-than-usual eye openings are one of a small group of facial features that, when they occur together, can suggest a developmental condition. They are most often discussed as a feature linked with alcohol exposure before birth, alongside other specific signs. The length of the eye openings is measured and compared with charts for the child's age, since what looks small to the eye is not always outside the normal range. As with other facial features, small eye openings carry weight only as part of a wider pattern.
Common Causes
Small eye openings can arise for several reasons:
- Normal variation: Many people simply have smaller or more almond-shaped eye openings with no underlying condition.
- Fetal alcohol spectrum disorders: Short eye openings are one of the recognised facial features of fetal alcohol syndrome, usually with other signs.
- Certain genetic conditions: Some inherited syndromes feature differences in the size or shape of the eye openings.
As with other facial features, small eye openings are significant mainly when combined with other features and a relevant history.
Associated Symptoms
When small eye openings are part of a developmental condition, they commonly appear with:
- A smooth philtrum, or flattened groove above the lip
- A thin upper lip
- Epicanthal folds, or skin folds at the inner eye
- Low birth weight and slow growth
- A small head size (microcephaly)
- Developmental delay or learning difficulties
Diagnosis & Evaluation
A doctor measures the length of the eye openings and compares them with charts for the child's age, while looking at other features and the history.
- Facial measurements: Including the length of the palpebral fissures.
- Growth and head measurements: Tracking weight, length, and head size.
- Developmental review: Assessing milestones, learning, and behaviour.
- Specialist evaluation: For suspected developmental or genetic conditions, sometimes including genetic assessment and an eye examination.
Treatment & Management
Small eye openings themselves need no treatment; care focuses on any underlying condition and on supporting the child.
- Developmental support: Early intervention, speech and language therapy, and occupational therapy where needed.
- Educational support: Tailored help with learning and behaviour.
- Eye care: An eye examination to check vision, with glasses or other support if required.
- Ongoing monitoring and family support: Of growth, development, and wellbeing.
When the feature is a normal variation, reassurance is all that is needed.
Self-Care & Prevention
Small eye openings that are simply a normal variation need no action. When they appear as part of a condition linked to alcohol exposure before birth, prevention focuses on pregnancy:
- Avoid alcohol in pregnancy: No amount of alcohol is known to be safe during pregnancy, so avoiding it entirely is the surest way to prevent fetal alcohol spectrum disorders.
- Stop before conceiving: The early weeks of pregnancy are an important time for the development of the face and brain.
- Seek confidential help: Anyone who struggles to stop drinking can ask a doctor or midwife for support.
For a child with the feature as part of a condition, care centres on supporting vision, development, and learning rather than the appearance of the eyes. Regular eye checks help ensure any vision needs are met early.
When to See a Doctor
See a doctor if small eye openings are noticed together with:
- Other distinctive facial features, such as a smooth philtrum or thin upper lip
- Slow growth, a small head size, or low birth weight
- Delayed milestones, learning difficulties, or behavioural concerns
- A history of alcohol exposure during pregnancy
- Any concern about the child's vision
Early assessment allows any underlying condition to be identified and support to begin promptly. Small eye openings alone, with normal growth and development, are usually not a concern.
Frequently Asked Questions
What are small eye openings?
Small eye openings, or short palpebral fissures, are eye openings that are shorter than average from the inner to the outer corner. Eye shape varies naturally, so this is often a normal trait, but it can be one of several features of a developmental condition.
Are small eye openings a sign of a problem?
Not usually on their own. They are significant mainly when they appear with other specific facial features, slow growth, or developmental concerns. The length of the eye openings is one measurement doctors use as part of a wider assessment.
What condition are small eye openings associated with?
Short eye openings are one of the characteristic facial features of fetal alcohol spectrum disorders, where they typically appear with a smooth philtrum and a thin upper lip. Diagnosis depends on the whole picture, including growth, development, and history.
When should small eye openings be evaluated?
See a doctor if they are noticed with other facial features, slow growth, a small head size, delayed milestones, a relevant pregnancy history, or any concern about vision. On their own, with normal development, they are usually not a cause for concern.
References
- Centers for Disease Control and Prevention (CDC). Fetal Alcohol Spectrum Disorders (FASDs).
- MedlinePlus, U.S. National Library of Medicine. Fetal alcohol spectrum disorders.
- National Institute on Alcohol Abuse and Alcoholism (NIAAA). Fetal Alcohol Spectrum Disorders.