Overview. The major passages and structures of the upper respiratory tract include the nose or nostrils, nasal cavity, mouth, throat (pharynx), and voice box (larynx). The respiratory system is lined with a mucous membrane that secretes mucus. The mucus traps smaller particles like pollen or smoke.
About more than 50 percent of optometrists received an annual salary ranging from between $70,140 and $125,460. According to the Bureau of Labor Statistics, the median hourly wage for an optometrist is around $51.42 per hour which averages to about $106,960 per annum.
Salary. The median annual optometrist salary, which is the amount where the same number of optometrists earn less than that amount and the same number earn more, is $97,820. The top 10% of optometrists earn $184,530; the lowest 10% earn less than $52,590.Optometrists generally maintain normal business hours during the week.It may be necessary for an optometrist to work outside normal business hours in order to meet the emergency needs of patients who suffered an eye injury.he top 10% of optometrists earn $184,530; the lowest 10% earn less than $52,590. Optometrists generally maintain normal business hours during the week. It may be necessary for an optometrist to work outside normal business hours in order to meet the emergency needs of patients who suffered an eye injury.