Eye surgery covers a wide range of procedures, but most share a common approach: a small, precise opening is made in the eye, the problem tissue is treated or replaced, and the eye is left to heal with minimal or no stitches. Nearly all eye surgeries use numbing drops rather than general anesthesia, meaning you stay awake the whole time but feel no pain. The specific steps depend entirely on what part of the eye needs repair.
Cataract Surgery
Cataract removal is the most commonly performed eye surgery worldwide. The procedure, called phacoemulsification, starts with an incision between 1.9 and 2.75 mm wide, small enough that it usually requires no stitches afterward. Through this tiny opening, the surgeon creates a precise circular tear in the thin capsule surrounding the clouded lens.
Next, the surgeon inserts an ultrasound-powered probe that vibrates at extremely high frequencies. This probe breaks the hardened, cloudy lens into tiny fragments while simultaneously suctioning them out. One common technique, called “divide and conquer,” involves sculpting a deep crater in the center of the lens, then fracturing the remaining rim into segments for easier removal. Another approach uses a sharp secondary instrument to chop the lens into quadrants before extracting each piece.
Once all the lens material is cleared, the surgeon inserts a folded artificial lens through the same small incision. The lens unfolds inside the eye and sits within the original capsule, permanently replacing the clouded one. The whole process takes roughly 15 to 20 minutes. Newer femtosecond laser systems can automate the incision and lens capsule opening, reducing the amount of ultrasound energy needed and allowing incisions as small as 1.5 mm.
LASIK and Laser Vision Correction
LASIK reshapes the cornea (the clear front surface of the eye) to correct nearsightedness, farsightedness, or astigmatism. It happens in two distinct laser steps. First, a femtosecond laser creates a thin, hinged flap on the cornea’s surface in a matter of seconds. The surgeon lifts this flap to expose the tissue underneath.
Then a second laser, called an excimer laser, delivers cool ultraviolet light pulses that vaporize microscopic amounts of corneal tissue in a pattern customized to your prescription. Flattening the cornea corrects nearsightedness; steepening it corrects farsightedness. Once the reshaping is complete, the surgeon lays the flap back down, where it naturally re-adheres without stitches.
The results are striking: 99% of patients achieve better than 20/40 vision, and over 90% reach 20/20 or better. Patient satisfaction sits at 96%. The entire procedure takes about 10 to 15 minutes for both eyes, and many people notice sharper vision within hours.
Retinal Surgery
When the retina detaches or develops holes, surgeons perform a procedure called a vitrectomy. The retina lines the back of the eye and is responsible for converting light into the signals your brain interprets as vision, so reattaching it quickly is critical.
The surgeon makes three tiny openings through the white of the eye to insert a light source, an infusion line (which keeps the eye inflated with fluid), and a cutting instrument called a vitrector. This tool simultaneously cuts and suctions out the vitreous, the gel-like substance filling the center of the eye. Removing it gives the surgeon direct access to the retina.
After repairing any tears or detachments (often with laser or freezing treatment), the surgeon fills the eye with a gas bubble or silicone oil to press the retina flat against the back wall while it heals. A short-acting gas bubble lasts 2 to 3 weeks, while a longer-acting one persists for 6 to 8 weeks. Silicone oil is used when the retina needs support for an extended period and is typically removed in a second procedure later. If you receive a gas bubble, you may need to hold your head in a specific position for days or weeks to keep the bubble pressing against the right spot.
Glaucoma Surgery
Glaucoma damages the optic nerve when pressure inside the eye builds too high. The most established surgical treatment, called trabeculectomy, creates an entirely new drainage channel so fluid can escape the eye and pressure drops.
The surgeon creates a tiny flap in the sclera (the white outer wall of the eye) and a small pocket in the thin tissue covering it, called a filtration bleb. Fluid from inside the eye seeps through the flap into this bleb, where it gets absorbed naturally by surrounding tissue. To keep the new pathway from closing, the surgeon may remove a small piece of the iris. The bleb sits under the upper eyelid, so it’s not visible to others. Over time, the body can try to scar the drainage channel shut, which is why follow-up care after glaucoma surgery is especially important.
Corneal Transplant
When the cornea becomes scarred, swollen, or misshapen beyond what other treatments can fix, a transplant replaces damaged tissue with healthy donor tissue. There are several approaches depending on which layers of the cornea are affected.
A full-thickness transplant removes a button-sized disc of the entire cornea using a special circular cutting instrument, then stitches a matching piece of donor cornea into the opening. These sutures can sometimes create slight irregularities in the corneal surface, causing astigmatism. Your doctor may later release or remove individual stitches to smooth things out.
Partial-thickness transplants are more targeted. If only the back layers of the cornea are diseased, surgeons can strip out just those inner layers and replace them with a thin disc of donor tissue, leaving the front of your cornea untouched. If the damage is on the front surface instead, the surgeon removes only the outer layers and grafts donor tissue on top while preserving the healthy back layers. These selective approaches generally heal faster and carry lower rejection risk than a full transplant.
What Anesthesia Feels Like
Most eye surgeries use topical numbing drops placed directly on the eye moments before the procedure. These drops block pain signals at the nerve endings in the eye’s surface, and they work almost instantly. You remain fully conscious. Some patients also receive a mild sedative through an IV to help with anxiety, but you won’t be “put under” for the vast majority of eye procedures. You may feel pressure or see bright lights during surgery, but pain is effectively eliminated.
A small device called a lid speculum holds your eyelids open so you don’t need to worry about blinking. For procedures involving the back of the eye, such as vitrectomy, a local anesthetic injection around the eye may be used in addition to drops, which also temporarily prevents eye movement.
Recovery and What to Expect After
Recovery timelines vary by procedure, but several guidelines apply broadly. Many patients notice improved vision within hours of surgery, though some haziness or blurriness in the first day or two is normal. Vision typically improves significantly by the next morning and continues sharpening over the following weeks. Full stabilization can take a few months depending on the procedure.
For the first day, rest your eyes and avoid driving, heavy lifting, or operating machinery. During the first one to two weeks, keep tap water, swimming pools, lakes, and hot tubs away from your eyes to prevent infection. Avoid rubbing or touching your eyes throughout the healing process, even if they itch. Screen time should be limited in the early days to reduce eye strain. Most people return to full normal activities within one to two weeks for laser procedures, though corneal transplants and retinal surgeries often require longer, more cautious recovery periods.
Your surgeon will prescribe antibiotic and anti-inflammatory eye drops to use on a set schedule after surgery. Follow-up appointments in the first week and month are standard for monitoring healing and catching any complications early.