snellen chart การใช้

• Whereas for adults a small Snellen chart letter or number can be used.
• This is identical to the letter C from a Snellen chart.
• A Snellen chart or other eye chart may initially reveal reduced visual acuity.
• A Snellen chart is one type of eye chart used to measure visual acuity.
• Snellen charts are named after Dutch ophthalmologist Hermann Snellen who developed the chart in 1862.
• A "'Snellen chart "'is an eye chart that can be used to measure visual acuity.
• The scale of the tumbling E chart is the same as with the standard Snellen chart.
• Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862.
• The Snellen chart is the most widely used.
• The chart is on the Web and accessible if you know it is called a Snellen chart.
• Most optometrists use the Snellen chart, familiar as the series of black letters printed on white card.
• In 1862 Dutch ophthalmologist Hermann Snellen introduced the popular " Snellen chart " for testing visual acuity.
• While the Snellen chart remains the default, some authors have argued that the logMAR chart is superior.
• The Snellen chart is an eye chart used by eye care professionals and others to measure visual acuity.
• (Top ) 0.50 Confirmation Set ( Middle ) Trial lens box, including pinhole and occluder ( Bottom ) Snellen Chart
• Since its inception, more copies of the Snellen Chart have been sold in the United States than any other poster.
• In the most familiar acuity test, a Snellen chart is placed at a standard distance : 6 metres ( or 20 ft in the US ).
• My distance vision tested by a Snellen chart is a bit better, around 40 arc seconds .-- talk ) 20 : 06, 1 January 2013 ( UTC)
• The LogMAR chart is designed to enable more accurate estimates of acuity as compared to other acuity charts ( e . g ., the Snellen chart ).
• This type of chart is a variation of the Snellen chart and shows the capital letter E at different sizes and rotated in increments of 90 degrees.