Why is corneal thickness particularly important for a second laser procedure?

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Why is corneal thickness particularly important for a second laser procedure?
An enhancement procedure removes additional tissue from a cornea that has already undergone surgery. We consider the residual stromal bed, total corneal thickness, corneal shape, and expected treatment depth together to reduce the risk of corneal ectasia. No single measurement guarantees safety, and we do not recommend enhancement if the eye does not meet our safety criteria.

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57	Can you assess my risk of glare and halos at night before surgery? Preoperative testing can identify factors that may contribute to glare and halos, including corneal shape, higher-order aberrations, pupil size, and dry eye. We use these findings to ｓelｅct and plan a...
56	What tests are used to diagnose retinal diseases? Common tests include a dilated retinal examination and optical coherence tomography (OCT). Depending on the condition, we may also use ultra-widefield retinal imaging, ocular ultrasound, or fluorescei...
55	What are the warning signs of retinal detachment? Symptoms may include a sudden increase in floaters, flashes of light, a curtain-like shadow across part of your vision, or sudden visual loss. Retinal detachment is often painless, so you should have ...
54	Can I drive myself home after my eye examination? We recommend using public transportation rather than driving to your comprehensive eye examination, whether or not pupil dilation is planned. Dilating drops can cause glare and blurred near vision for...
53	Which vision correction procedure is right for me—LASIK, LASEK, or implantable lenses? The best option depends on the results of a comprehensive eye examination. We assess your corneal thickness and shape, degree of nearsightedness and astigmatism, dry eye symptoms, pupil size, and reti...
52	. Will I still need glasses after cataract surgery? That depends on the type of intraocular lens (IOL) implanted and the condition of your eyes. A monofocal IOL is generally designed to provide clear vision at one focal distance, while some multifocal ...
51	Can I have cataract surgery if I previously had LASIK or LASEK? Yes. However, previous LASIK or LASEK changes the shape of the cornea, which can make calculating the correct IOL power more challenging. Pre-existing irregular astigmatism or higher-order aberrations...
50	Can I get a second opinion after seeing another eye doctor? Yes. We can provide a second opinion about a diagnosis or the results of surgery performed elsewhere. Bringing previous test results, surgical records, or prescriptions can help us understand your eye...
49	I suddenly have a shadow over part of my vision. Do I need an appointment? Sudden loss of vision or a new shadow covering part of your visual field needs prompt medical attention, even without an appointment. During business hours, call the clinic to check whether an urgent ...
48	What is a Light Adjustable Lens (LAL), and what are its advantages? A Light Adjustable Lens (LAL) is an intraocular lens whose optical power can be adjusted with light after cataract surgery. Its main advantage is that nearsightedness, farsightedness, and astigmatism ...
47	I have severe halos after receiving a multifocal IOL. Can the lens be replaced? An IOL exchange may be an option, but first we check for other causes of glare or halos, such as residual astigmatism, dry eye, posterior capsule opacification, or lens decentration. Lens exchange doe...
46	Does an epiretinal membrane always need to be removed? Not necessarily. If blurred or distorted vision is mild and OCT scans show little change, observation may be appropriate. Surgery may be considered if symptoms begin to interfere with daily activities...