In 2002, the first contact lens for overnight ortho-k was approved by the U.S. Food and Drug Administration (FDA). These reverse geometry lenses, labeled Class III devices, were approved to treat myopia up to –6.00D with or without 1.75D of cylinder, with no age restrictions. A few years later, another company received FDA approval for overnight ortho-k to treat myopia and low astigmatism with lens designs manufactured through a number of different laboratories. These approvals gave ortho-k a layer of regulation, adding reassurance for practitioners, patients, and parents who were interested in trying this unique but relatively unknown vision correction technique. Contact Lens Spectrum | PentaVision (clspectrum.com) clspectrum.com/issues/2020/october/orthokeratology-for-today/ 可以纠正散光，超过上边FDA 批准写的度数，医生也给做但属于off label use。
这个和你医生选用镜片材料有关，不同公司做出来不一样效果。不同制造商用的材料工艺不同没法比较，除非一个厂家, 白天的和其他白天用的需要差不多吧。 OK镜属于Gas Permeable Lenses Misight 属于silicone hydrogel 晚上戴的需要高透氧 Oxygen transmissibility (DK/t) is an important parameter when prescribing a contact lens. Since orthokeratology lenses are worn overnight, higher oxygen permeability rates are needed to avoid ocular hypoxia. Effectiveness and Safety of Overnight Orthokeratology with Roflufocon E High-Permeability Lens Material: A 36 Weeks Follow-Up Study (biomedres.us) Is silicone hydrogel better than gas permeable lenses? Gas permeable lenses provide a better oxygen supply than most soft lenses because: The silicone-containing lens materials of GP lenses are more permeable to oxygen than many soft lens materials (though new "silicone hydrogel" soft lenses are comparable to GPs in oxygen transmission).GP lenses allow your eyes to "breathe" better. GP lenses allow more oxygen to reach the front surface of the eye. This reduces the risk of eye problems caused by hypoxia (reduced oxygen supply). Gas permeable lenses provide a better oxygen supply than most soft lenses because: The silicone-containing lens materials of GP lenses are more permeable to oxygen than many soft lens materials (though new "silicone hydrogel" soft lenses are comparable to GPs in oxygen transmission). GP lenses are smaller in diameter than soft lenses, so they cover up less of the front surface of the eye (the cornea). Gas permeable lenses hold their shape and move on the eye with each blink. This movement pumps oxygen-containing tears under the lens. Soft lenses conform to the shape of the cornea and have only minimal movement with blinks, so little or no tears circulate under soft lenses. www.hopkinseyecenter.com/eyeglasses-contacts/contact-lenses/gas-permeable-gp-contact-lenses/#:~:text=Gas%20permeable%20lenses%20provide%20a,to%20GPs%20in%20oxygen%20transmission). 看上边这篇介绍，感觉谁白天戴软性的不舒服干眼的可以考虑换硬的眼镜。 难道说戴过硬的换成软的会不舒服吗？我还准备孩子大了换成软的，因为听说很多上大学的晚上睡不到8小时，戴OK镜需要晚上睡够8小时。
hellohey 发表于 2024-03-13 16:23 这个和你医生选用镜片材料有关，不同公司做出来不一样效果。不同制造商用的材料工艺不同没法比较，除非一个厂家, 白天的和其他白天用的需要差不多吧。 OK镜属于Gas Permeable Lenses Misight 属于silicone hydrogel 晚上戴的需要高透氧 Oxygen transmissibility (DK/t) is an important parameter when prescribing a contact lens. Since orthokeratology lenses are worn overnight, higher oxygen permeability rates are needed to avoid ocular hypoxia. Effectiveness and Safety of Overnight Orthokeratology with Roflufocon E High-Permeability Lens Material: A 36 Weeks Follow-Up Study (biomedres.us) Is silicone hydrogel better than gas permeable lenses? Gas permeable lenses provide a better oxygen supply than most soft lenses because: The silicone-containing lens materials of GP lenses are more permeable to oxygen than many soft lens materials (though new "silicone hydrogel" soft lenses are comparable to GPs in oxygen transmission).GP lenses allow your eyes to "breathe" better. GP lenses allow more oxygen to reach the front surface of the eye. This reduces the risk of eye problems caused by hypoxia (reduced oxygen supply). Gas permeable lenses provide a better oxygen supply than most soft lenses because: The silicone-containing lens materials of GP lenses are more permeable to oxygen than many soft lens materials (though new "silicone hydrogel" soft lenses are comparable to GPs in oxygen transmission). GP lenses are smaller in diameter than soft lenses, so they cover up less of the front surface of the eye (the cornea). Gas permeable lenses hold their shape and move on the eye with each blink. This movement pumps oxygen-containing tears under the lens. Soft lenses conform to the shape of the cornea and have only minimal movement with blinks, so little or no tears circulate under soft lenses. www.hopkinseyecenter.com/eyeglasses-contacts/contact-lenses/gas-permeable-gp-contact-lenses/#:~:text=Gas%20permeable%20lenses%20provide%20a,to%20GPs%20in%20oxygen%20transmission). 看上边这篇介绍，感觉谁白天戴软性的不舒服干眼的可以考虑换硬的眼镜。 难道说戴过硬的换成软的会不舒服吗？我还准备孩子大了换成软的，因为听说很多上大学的晚上睡不到8小时，戴OK镜需要晚上睡够8小时。
要防止近视的话还是需要天天戴，每天戴满8个小时。 近视镜片是每半年一次收费的，你不够了还可以打电话要。你如果不每天戴岂不是很吃亏？
是的每年要一千多，所以目前为止发现Mysight 的缺点就是贵。
你们价格真好，我们之后每年还需要1200：（ 今年过些天要去看不知道还涨价不？问了在我们医生那做Misight也一个价格1200. 但是COSTCO有更好价格
Ok镜能纠正散光？
医生说可以，但只是低度散光，超过两百度散光OK也不行，散光比近视还麻烦，一旦度数高了，只能框架
我家2020年10月算第一批戴的吧，到现在550涨到600度/另一只眼睛也涨了50度
In 2002, the first contact lens for overnight ortho-k was approved by the U.S. Food and Drug Administration (FDA). These reverse geometry lenses, labeled Class III devices, were approved to treat myopia up to –6.00D with or without 1.75D of cylinder, with no age restrictions. A few years later, another company received FDA approval for overnight ortho-k to treat myopia and low astigmatism with lens designs manufactured through a number of different laboratories. These approvals gave ortho-k a layer of regulation, adding reassurance for practitioners, patients, and parents who were interested in trying this unique but relatively unknown vision correction technique. Contact Lens Spectrum | PentaVision (clspectrum.com) clspectrum.com/issues/2020/october/orthokeratology-for-today/ 可以纠正散光，超过上边FDA 批准写的度数，医生也给做但属于off label use。
是
misight对近视的控制更好吗？
这个和你医生选用镜片材料有关，不同公司做出来不一样效果。不同制造商用的材料工艺不同没法比较，除非一个厂家, 白天的和其他白天用的需要差不多吧。 OK镜属于Gas Permeable Lenses Misight 属于silicone hydrogel 晚上戴的需要高透氧 Oxygen transmissibility (DK/t) is an important parameter when prescribing a contact lens. Since orthokeratology lenses are worn overnight, higher oxygen permeability rates are needed to avoid ocular hypoxia. Effectiveness and Safety of Overnight Orthokeratology with Roflufocon E High-Permeability Lens Material: A 36 Weeks Follow-Up Study (biomedres.us)
Is silicone hydrogel better than gas permeable lenses? Gas permeable lenses provide a better oxygen supply than most soft lenses because: The silicone-containing lens materials of GP lenses are more permeable to oxygen than many soft lens materials (though new "silicone hydrogel" soft lenses are comparable to GPs in oxygen transmission). GP lenses allow your eyes to "breathe" better. GP lenses allow more oxygen to reach the front surface of the eye. This reduces the risk of eye problems caused by hypoxia (reduced oxygen supply). Gas permeable lenses provide a better oxygen supply than most soft lenses because: The silicone-containing lens materials of GP lenses are more permeable to oxygen than many soft lens materials (though new "silicone hydrogel" soft lenses are comparable to GPs in oxygen transmission). GP lenses are smaller in diameter than soft lenses, so they cover up less of the front surface of the eye (the cornea). Gas permeable lenses hold their shape and move on the eye with each blink. This movement pumps oxygen-containing tears under the lens. Soft lenses conform to the shape of the cornea and have only minimal movement with blinks, so little or no tears circulate under soft lenses.
www.hopkinseyecenter.com/eyeglasses-contacts/contact-lenses/gas-permeable-gp-contact-lenses/#:~:text=Gas%20permeable%20lenses%20provide%20a,to%20GPs%20in%20oxygen%20transmission). 看上边这篇介绍，感觉谁白天戴软性的不舒服干眼的可以考虑换硬的眼镜。 难道说戴过硬的换成软的会不舒服吗？我还准备孩子大了换成软的，因为听说很多上大学的晚上睡不到8小时，戴OK镜需要晚上睡够8小时。
谢谢提供文献！我自己有干眼的问题，不能带隐形，所以很在意给娃带ok或misight的透氧性，这个文章里提到了镜片大小和贴合度导致的透氧性差别倒是之前没想到的。因为娃小，医生推荐misight，但很怕透氧性不好导致干眼
misight的好处是因为软的比硬的OK镜最开始好佩戴这点是肯定的，但是一旦熟练一秒就可以戴上，我家孩子就属于这样，一开始也花了一两小时，一周后好转，关键是她自己戴的，我在配之前让她看了佩戴录像，外加教会她看镜子里自己的黑瞳往里戴。
3天不带都清楚很可能是因为过矫了。实际度数眼轴早就涨很多了。
眼轴长度是度数增长的本质。眼轴每年在0.2 毫米的增幅是正常生理增涨（控制在这个速度可能不会度数增长，低于这个速度可能度数会回退）
近视控制的本质是控制这个眼轴增长。很多认真防控的家长都是每个月监测一次。 机器也非常重要，最好的机器是蔡司iol master 700。
增加户外，望远，将ipad 转为6米以外投影，写作业用拉远镜都是有效的控制手段。