{"id":1963,"date":"2026-10-20T08:54:21","date_gmt":"2026-10-20T08:54:21","guid":{"rendered":"https:\/\/laseristanbulclinic.com\/eye-health\/laser-eye-surgery\/laser-eye-surgery-for-astigmatism-and-high-prescriptions\/"},"modified":"2026-10-20T12:59:18","modified_gmt":"2026-10-20T12:59:18","slug":"laser-eye-surgery-for-astigmatism-and-high-prescriptions","status":"publish","type":"page","link":"https:\/\/laseristanbulclinic.com\/en\/eye-health\/laser-eye-surgery\/laser-eye-surgery-for-astigmatism-and-high-prescriptions\/","title":{"rendered":"Laser Eye Surgery for Astigmatism and High Prescriptions: How Much Can Be Corrected?"},"content":{"rendered":"\n
\n\t
\n\t\t
\n\t\t\t
  1. Home<\/a><\/li>
  2. Knowledge centre<\/a><\/li>
  3. Laser eye surgery guides<\/a><\/li>
  4. Laser Eye Surgery for Astigmatism and High Prescriptions: How Much Can Be Corrected?<\/span><\/li><\/ol><\/div>\t\t\t

    Laser Eye Surgery for Astigmatism and High Prescriptions: How Much Can Be Corrected?<\/h1>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t
    \n\t\t\t\t\t\t
    \"Excimer<\/figure>\n\t\t\t\t\t\t\t\t\t

    Laser eye surgery for astigmatism is done in the same treatment as short or long sight. The Royal College of Ophthalmologists gives the usual laser range as up to \u221210.00 D of short sight, +4.00 D of long sight and \u00b16.00 D of astigmatism, with some higher prescriptions treatable. Corneal thickness and shape matter as much as the number. Prof. Dr. Ahmet Sat\u0131c\u0131 or Op. Dr. Aysan Bayram decides after scanning your corneas.<\/p><\/div>\n\t\t\t\t\t<\/div>\n\t<\/div><\/div>\n<\/section>\n\n\n\n\n

    \n\t\t

    What counts as a high prescription or high astigmatism?<\/h2>\n\t\t\t\t

    A “high” prescription is a strong number on your glasses prescription, and the threshold depends on the type of error. The International Myopia Institute (IMI) uses \u22126.00 dioptres (D) or stronger as the threshold for high short sight (myopia). EyeWiki, the American Academy of Ophthalmology’s (AAO) clinical encyclopaedia, calls long sight (hyperopia) high at +5.25 D or more. For astigmatism, a 2023 systematic review in Optometry and Vision Science<\/em> grades it as mild below 1.50 D, moderate from 1.50 to 2.50 D and significant above 2.50 D.<\/p>

    Error<\/th>Where to find it on your prescription<\/th>Commonly called “high”<\/th><\/tr><\/thead>
    Short sight (myopia)<\/th>SPH, a minus number<\/td>\u22126.00 D or stronger (IMI)<\/td><\/tr>
    Long sight (hyperopia)<\/th>SPH, a plus number<\/td>+5.25 D or more (EyeWiki)<\/td><\/tr>
    Astigmatism<\/th>CYL (the strength) and AXIS (a number from 0 to 180)<\/td>Above 2.50 D (2023 review)<\/td><\/tr><\/tbody><\/table><\/div>

    Astigmatism is common: the same review puts its pooled prevalence at about 40% of adults worldwide. It also affects how you see at night. Among people with uncorrected astigmatism, the review reports glare in 53\u201377%, halos in 28\u201380% and night-driving difficulty in about 66%. That is why many people with astigmatism look into laser eye surgery.<\/p>

    Laser eye surgery guides <\/svg><\/a><\/div><\/div>\t<\/div><\/div><\/div><\/section>\n\n\n\n\n

    Can laser eye surgery fix astigmatism?<\/h2><\/div>

    Yes. Laser eye surgery reshapes the cornea so that its steeper and flatter curves focus light at the same point. It is not a separate operation: the NHS lists astigmatism, short sight and long sight together as the conditions laser surgery can correct, and your astigmatism is treated in the same session as the rest of your prescription.<\/p>\n

    Three laser methods can treat astigmatism, and your surgeon chooses between them:<\/p>\n