User:GreenWaterBottle2/Ocular tremor

The introductory paragraph is a big improvement over what is currently in the article. I’m wondering if the plan is to keep the two sections which start with “It occurs…” and ends with “…Stabilized Images”? (I think you ended up removing these sections which is fine!). I think these sections are useful and the “Cause and Function” could go immediately afterwards, unless the author was planning to replace the intro with the aforementioned “Cause and Function” section. It seems like the references currently being used in the live article are credible, so no changes need to be made there. I searched for a supporting source for the “Abnormal Tremors” section but was unable to come up with anything, so this section could be removed as stated in the Sandbox notes. The See Also section is useful in directing readers to related subject pages.

Connor Newman

''' ** First draft is complete. Will likely remove section on abnormal tremor if I can't find a secondary or tertiary source discussing a link between ocular tremor and diseases such as Parkinson's, MS, etc.'''

** I am currently trying out edits and will edit the live Ocular Tremor article after my work is reviewed by my Advanced Writing class.

Ocular tremor (ocular microtremor) is a constant, involuntary eye tremor of a low amplitude and high frequency. It is a type of fixational eye movement that occurs in all normal people, even when the eye appears still. The frequency of ocular microtremor has been found to range from 30 Hz to 103 Hz, and the amplitude is approximately four thousandths of a degree.

Cause
Human eyes are constantly moving, even if they appear to be focused on an object. These constant oscillations are called fixational eye movements, and they include ocular microtremor, microsaccades, and drift. Ocular tremor is the smallest of these movements, and it often overlaps with drift. This makes it the most difficult fixational eye movement to measure. Due to these difficulties in measurement, fewer studies have been performed on ocular microtremor, leading to the phenomenon of ocular tremor not being well-understood.

Researchers are not entirely sure of the cause of ocular microtremor. It may be a result from the firing of motor neurons at different times. It has also been suggested that ocular tremor is a result of the eye being balanced between opposing muscles.

Size and Measurement
Ocular microtremor is smaller than the other fixational eye movements of microsaccades and drift. It occurs between microsaccades, during the same time intervals as drift. The measured frequency and amplitude of ocular tremor have been found to vary. The frequency typically falls between 30 Hz and 103 Hz, while the amplitude has been measured to be approximately four thousandths of a degree.

Specific tools, known as piezoelectric probes or piezoelectric strain gauges, are commonly used to measure ocular microtremor. A local anesthetic is used for both of these invasive methods, because contact with the sclera is required. While non-contact methods of measuring ocular tremor have been found, they are not typically used due to their low resolution.