Kashyap Memorial Eye Hospital is the 1st NABH accredited eye superspeciality hospital in North,East and West Zone of India. It is also ISO 9001-2008 Certified

Know More About Catract Services

1. What is cataract?

A cataract is a clouding of the lens inside the eye which leads to a decrease in vision. It is the most common cause of blindness and is conventionally treated with surgery. Visual loss occurs because opacification of the lens obstructs light from passing and being focused on the retina at the back of the eye.


It is most commonly due to aging but there are many other causes. Over time, yellow-brown pigment is deposited in the lens and this, together with disruption of the lens fibers, reduces the transmission of light and leads to visual problems.


Those with cataracts often experience difficulty in appreciating colors and changes in contrast, driving, and reading, recognizing faces, and coping with glare from bright lights



Many Other Causes are:


Age,Trauma,Radiation,Genetics,Skin Diseases,DrugUse,Medication,Other Diseases.


2. How can it be treated?

If your vision can be corrected to an acceptable level with a change in prescription, eyeglasses, including bifocals or contacts, may be prescribed, eliminating the need for surgery at that time.


If your vision loss cannot be corrected with new glasses and cataracts interfere with your daily life, you may be a candidate for cataract surgery, which involves removing the clouded lens and replacing it with a clear, artificial one.


Cataract surgery is usually conducted on an outpatient basis and is very successful in restoring vision.


3. Can Cataracts Be Prevented?

Because the exact cause of cataracts is uncertain, there is no proven method of preventing them. Because cataracts and other conditions such as glaucoma are common in older adults, it's important to have your eyes examined on a regular basis.


This is particularly important if you have risk factors or a family history of eye problems. Adults should see an eye doctor at least every two years and annually after age 50.


People with a history of eye problems or other medical conditions that increase the risk of eye disease -- such as diabetes -- may need eye exams more frequently.


Be sure to ask your doctor if you have any risk factors or indications that cataracts or other conditions may affect your vision.


4. What Is Phaco Cataract Surgery?

Phacoemulsification refers to modern cataract surgery in which the eye's internal lens is emulsified with an ultrasonic handpiece and aspirated from the eye. Aspirated fluids are replaced with irrigation of balanced salt solution, thus maintaining the anterior chamber, as well as cooling the handpiece.


5. What is the latest technology for Cataract Surgery?

The bladeless femtosecond laser cataract Refractive suite (The world’s best and latest laser cataract removal technique 3rd in India & 1st in eastern India)

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The LenSx®

The use of the femtosecond laser (FSL) in cataract surgery may represent the largest advancement in the field since the inception of phacoemulsification. The goal of this review is to outline the benefits of and barriers to this technology.There are several significant potential benefits of the FSL in cataract surgery over conventional manual cataract surgery: precise capsulotomy formation, clear corneal and limbal relaxing incision construction, lens fragmentation, and lens softening. Refractive benefits include more precise effective lens position as well as reduced effective phacoemulsification time with the use of FSL compared with manual surgery. Patients with conditions such as Fuchs' endothelial dystrophy, pseudoexfoliation, history of trauma, or brunescent cataracts particularly benefit from this technology.



CENTURION® Vision System

The new CENTURION® Vision System is the most advanced phacoemulsification (phaco) technology that optimizes every moment of the cataract surgical procedure. The new system automatically and continuously adapts to changing conditions within the eye, provides greater anterior chamber stability during each step of the surgery, and places optimized energy technology at the surgeon’s fingertips through enhanced fluidic management and surgical precision.



The LuxOR™ LX3

The LuxOR™ LX3 with Q-VUE™ Ophthalmic Microscope is part of The Cataract Refractive Suite by a unique combination of technologies at the forefront of cataract refractive surgery.



The VERION™

The VERION™ Image Guided System is designed to add greater accuracy and efficiency during surgical planning and execution. Consisting of the VERION™ Reference Unit and the VERION™ Digital Marker, it enhances the way one performs cataract surgery.



6. Why is LensX Laser Cataract Surgery better than routine phaco cataract surgery?

Laser Cataract: Better Outcomes May Follow


Laser outcomes surpass manual outcomes.

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Clinical evidence supporting the supposition that femtosecond laser-assisted cataract surgery will actually produce better outcomes than manual cataract surgery has been proved. Here, three surgeons at Kashyap Memorial Eye Hospital share their reasons for believing that femtosecond cataract surgery produces better results than manual surgery, thanks to more accurate astigmatic arcuate incisions; a more “perfect” capsulorhexis; being able to soften the nucleus; creating fewer complications; increasing efficiency.


Treating Astigmatism

Femtosecond laser cataract surgery offers a dramatic improvement in surgeons’ ability to make both consistent cataract wounds and extremely accurate astigmatic arcuate incisions. “The incisions a surgeon makes with the laser is much more precisely placed on the cornea and repeatable than can possibly be made manually using a diamond knife, “Both cataract incisions and arcuate keratotomy incisions are going to be substantially more precise. One can’t make an arcuate incision at exactly 43 degrees, exactly 80 percent of the measured depth of the cornea and exactly 46 degrees in arc width, using a diamond knife.


About 80 percent of cataract surgeons are not comfortable making arcuate incisions in the cornea to correct astigmatism. That’s why the arcuate incision has never become the predominant method for correcting astigmatism, and the toric lens has increased much more rapidly than arcuate keratotomy. But that’s going to change, because the cataract surgeon won’t have to make that precise incision himself. A nomogram in the laser will determine where to put it, and how wide and deep to make it. The surgeon just has to press a button.


The laser has been great at incisional astigmatic surgery. “It makes perfect cut and giving excellent result. More than 95 percent of the patients treated for astigmatism have demonstrated less than 0.5 D of residual astigmatism two weeks after the procedure. No one can make manual incisions of a predictable, consistent depth the way the laser can.”


A ‘Perfect’ Capsulorhexis

Capsulorhexis is more regular, or more circular, and it’s placed exactly where we want it to be, then it’s possible that we’ll get a more consistent centration and positioning of the IOL. For example, a symmetrically circular capsulorhexis makes difference in the lateral position, in terms of centration, which in turn can have a small effect on the IOL power calculation.


A more circular capsulorhexis has an effect on posterior capsular opacification. “Ideally we want the rhexis to cover the outer quarter- or half-millimeter of the lens, and we want it to overlap the lens all the way around, uniformly,Studies have shown that two things help to reduce PCO. First, a sharp posterior IOL edge pushed against the posterior capsule helps prevent epithelial cells from getting under the lens onto the posterior capsule. Second, a consistent overlap by the anterior capsule sequesters the epithelial cells into the little peripheral chamber that’s created along the edge of the lens, and they can’t get out. There’s a much better chance that one can get that perfect overlap with the femtosecond laser than manually.


Softening the Nucleus

Femtosecond laser’s ability to facilitate the division of the nucleus is most impressive. We’ve tried different approaches with this part of the procedure.


There are several advantages to facilitating the removal of the nucleus. “First, removal of the nucleus is clearly the most difficult part of phaco, and the most difficult part of removal is dividing the nucleus. After using the femtosecond laser the nucleus divides easily and removing the segments is pretty simple. So, this tool helps us with the hardest part of the surgery. Furthermore, if it takes less time to divide and remove the nucleus, there are clearly benefits to that, including less trauma to the eye. We are running less fluid through the eye, manipulating tissue less and preserving more endothelial cells.”


This potentially affects refractive outcomes as well. “The other thing that manipulation inside the eye does is stress the zonule, People have theorized that it’s a more consistent capsulorhexis that gives you a more consistent effective lens position, but the tautness of the zonule is what determines the position of the IOL. So to the extent that we don’t stress the zonule, likelihood of ending up with a more predictable ELP is much more.


“Is a more consistent capsulorhexis a desirable thing? Of course,” he adds. “But those of us who’ve done tens of thousands of these surgeries can do a good capsulorhexis and get the edges on the optic 360 degrees pretty much every time. So when a surgeon like Bob Cionni reports that in his hands ELP is more predictable with the laser, I suspect that the reason is that the division of the nucleus is less traumatic. It doesn’t stress the zonule as much, so lens position becomes more predictable.”

Overall Refractive Outcomes

It has better refractive outcomes.
“The speed of laser is already better than when it was started first, This technology has tremendous potential, And, it keeps getting better.”



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The iTrace Ray Tracing Wavefront Aberrometer gives us a better aberrometer design and better information, so that we can make better decisions on customized cataract surgery.

applications are the diagnosis of irregular astigmatismand the assessments of the optical quality of the eye. Because the higher-order aberrations of the eye are expressed as the total root mean square errors, a set of coefficients for the Zernike terms, point spread functions, modulation transfer functions, and other types of metrics can be determined, hence the deterioration in the quality of vision can be easily estimated.

Simulations of the retinal images are also useful to understand some of the symptoms in patients with irregular astigmatism. With corneal topographic analyses, the origin of irregular astigmatism from the cornea or internally, or both, can be specified by aberrometry.

The ZEISS IOLMaster 500 is the gold standard in optical biometry with more than 100 million successful IOL power calculations to date. With the new version of the ZEISS IOLMaster 500 we have got a piece of cutting-edge technology that points the way to the future of optical biometry.