Infantile esotropia is an ocular condition of early onset in which one or either eye turns inward. It is a specific sub-type of esotropia and has been a subject of much debate amongst ophthalmologists with regard to its naming, diagnostic features, and treatment. Presentation
Historically the term congenital strabismus was used to describe constant esotropias with onset between birth and six months of age. However, this term was felt to be an inadequate classification as it covered a variety of esotropias with different causes, features and prognoses. In 1988, American ophthalmologist Gunter K. Von Noorden discussed what he described as Essential Infantile Esotropia. He described the condition as: 
"early acquired, not... congenital ..., although congenital factors may favor its development between the ages of 3 and 6 months"

 and identified this squint sub-type as having the following features:
Onset between birth and six months of age. Large size (greater than 30 dioptres)
Stable size
Not associated with abnormalities of the central nervous system. Often associated with defective abduction (outward movement) and excessive adduction (inward movement) of the eyes. Also associated with oblique muscle dysfunction and Dissociated Vertical Deviation. Initial alternation of the squint present with crossed fixation, i.e. the affected individual uses the left eye to look right and the right eye to look left.
Stridor (Latin for "creaking or grating noise") is a high-pitched extra-thoracic breath sound resulting from turbulent air flow in the larynx or lower in the bronchial tree. It is different from a stertor which is a noise originating in the pharynx. Stridor is a physical sign which is caused by a narrowed or obstructed airway. It can be inspiratory, expiratory or biphasic, although it is usually heard during inspiration. Inspiratory stridor often occurs in children with croup. It may be indicative of serious airway obstruction from severe conditions such as epiglottitis, a foreign body lodged in the airway, or a laryngeal tumor. Stridor should always command attention to establish its cause. Visualization of the airway by medical experts equipped to control the airway may be needed. Causes
Stridor may occur as a result of:

foreign bodies (e.g., aspirated foreign body, aspirated food bolus);
infections (e.g., epiglottitis, retropharyngeal abscess, croup);
subglottic stenosis (e.g., following prolonged intubation or congenital);
airway edema (e.g., following instrumentation of the airway, tracheal intubation, drug side effect, allergic reaction);
laryngospasm (from aspiration, GERD, or complication of anesthesia)
subglottic hemangioma (rare);
vascular rings compressing the trachea;
thyroiditis such as Riedels thyroiditis;
vocal cord palsy;
tracheomalacia or tracheobronchomalacia (e.g., collapsed trachea). congenital anomalies of the airway are present in 87% of all cases of stridor in infants and children. vasculitis. infectious mononucleosis
peritonsillar abscess
Laryngeal edema is a common cause of stridor post extubation (occurring from pressure of the endotracheal tube on the mucosa as a result of endotracheal tube that is too large (e.g. pediatrics), cuff over inflation, and prolonged intubation times.