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  2. Refractive error - Wikipedia

    en.wikipedia.org/wiki/Refractive_error

    A distant object is defined as an object located beyond 6 meters (20 feet) from the eye. When an object is located close to the eye, the rays of light from this object no longer approach the eye parallel to each other. Consequently, the eye must increase its refractive power to bring those rays of light together on the retina.

  3. List of sweetcorn varieties - Wikipedia

    en.wikipedia.org/wiki/List_of_sweetcorn_varieties

    Multicolored varieties are usually at their sweetest when the mature color just starts to "blush" on the kernels. Hookers, 70 days (open pollinated, white turning blue at maturity) Triple Play, 70 days (open pollinated, white-yellow bicolor turning partially blue at maturity) Painted Hill, 75 days (open pollinated, mostly white turning various ...

  4. Eye chart - Wikipedia

    en.wikipedia.org/wiki/Eye_chart

    Landolt C. Lea test. logMAR chart. An eye chart is a chart used to measure visual acuity comprising lines of optotypes in ranges of sizes. Optotypes are the letters or symbols shown on an eye chart. [1] Eye charts are often used by health care professionals, such as optometrists, physicians and nurses, to screen persons for vision impairment.

  5. Snellen chart - Wikipedia

    en.wikipedia.org/wiki/Snellen_chart

    Snellen chart is used to estimate visual acuity (last three rows are 20/15, 20/13 and 20/10) A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula developed by his professor ...

  6. Corncob - Wikipedia

    en.wikipedia.org/wiki/Corncob

    Corncob. A corncob also called corn cob or cob of corn, is the hard core of an ear of maize, bearing the kernels. It consists of the pith and a woody ring. A cross-section of an ear of corn, showing the cob. Young ears, also called baby corn, can be consumed raw, but as the plant matures, the cob becomes tougher until only the kernels are truly ...

  7. Why Do My Ears Itch? (And How to Make It Stop) - AOL

    www.aol.com/lifestyle/why-ears-itch-stop...

    Key Takeaways: Itchy ears are not uncommon when adjusting to hearing aids, as it takes time for the ear to adjust to the presence of a hearing aid. Other common causes of itchy ears includes ...

  8. Helicoverpa zea - Wikipedia

    en.wikipedia.org/wiki/Helicoverpa_zea

    Helicoverpa zea. Helicoverpa zea, commonly known as the corn earworm, is a species (formerly in the genus Heliothis) in the family Noctuidae. [1] The larva of the moth Helicoverpa zea is a major agricultural pest. Since it is polyphagous (feeds on many different plants) during the larval stage, the species has been given many different common ...

  9. How the (Finally Ended) Corn Ethanol Subsidy Made Us Fatter

    www.aol.com/news/2012-01-04-how-the-finally...

    The saddest part of the subsidy saga is that corn isn't actually all that good as a source for fuel. For years, critics have argued that other crops, including sweet potatoes, wood chips, and even ...