A cataract is opacity of the lens. Cataract operation is indicated only when you cannot function adequately due to poor sight produced by the cataract. Maturity of cataract is no longer a criterion for surgery. The natural lens within your eye with a slight cataract, although not perfect, has distinct advantages over an artificial lens. In giving permission for cataract extraction with / without implantation of an intraocular lens in my eye, I declare that I understand the following information1. Alternative Treatments :There are three methods of restoring vision after cataract surgery a) Cataract Spectacles b) Contact Lens c) Intraocular Lens Cataract spectacles increase image size by 30%. They cannot be used if there is cataract in only one eye (the other is normal) because they may cause double vision. A contact lens increases image size by 8%. However, it is difficult to handle and may not be toleratedby everyone. Intraocular lens does not increase image size. It is surgically placed inside the eye permanently2. An intraocular lens is implanted by surgery (not by laser). The implanted lens will be left in the eye permanently. At the time ofsurgery the doctor may decide not to implant an intraocular lens in the eye, if for any reason he feels that the lens implantation isnot indicated or may prove deleterious to the well being of the eye, even though permission may have been given to do so3. Though the intraocular implant power is calculated by utilizing a computerised Biometer (A-scan), a small correction in thespectacles is to be considered inevitable postoperatively and this may be more in specific cases. An astigmatism (number with axis)which may reduce with time, is to be taken as inevitable and normal. Therefore, a small power is to be expected in the spectacles fordistance and near for clear vision after the operation. In any case, the aim of cataract surgery is to remove the cloudy lens from theeye and replace it with a plastic lens and not to rid the patient of his spectacles4. The calibre of vision obtained after a successful cataract surgery/lens implantation depends upon the retina behind. In an advancedcataract even with the most sophisticated instruments (Ultrasound Scan etc.), it is not possible to be certain that the retina inside isnormal. Removal of cataract is like opening a door to a room. If the retina is normal, you will see well, but it is not possible in amajority of advanced cataract cases to ascertain the visual status of the retina before operation5. With modern instrumentation and micro surgical techniques, the rate of complications in cataract surgery with/without intraocularlens implantation is very low. Complications can usually be managed by medical and/or surgical treatment. The chances of totalloss of vision are less than 0.5%. However, the following complications can occur and are mentioned in standard text books ofcataract and lens implantation surgerya) It is possible that vision may drop after surgery due to thickening/opacification of the posterior capsule. This is not acomplication but a sequelae to Extra Capsular Cataract Extraction. The condition is treated with the “Yag Laser”b) Complications may include haemorrhage (bleeding), posterior capsule rupture, nucleus drop, vitreous loss, wound leakage,uveitis, cornea! decompensation, glaucoma, cystoid macular oedema or retinal detachment. In addition lens implantationmay be complicated by severe reaction to the lens (Toxic Lens Syndrome) or dislocation of the lens. The implanted lens mayhave to be repositioned or removed surgically if it is likely to damage the eye. Though every effort is made to minimize thechances of infection, it cannot be eliminated altogether. Loss of vision is a risk common to any intraocular surgeryc) Although you may have opted for phacoemulsification surgery and the same may have been planned by your surgeon after

1. I hereby authorize Dr. {[____Consultant____]} and those whom he may designate as associates or assistants to perform : {[_______________Procedure_______________]} operation with an intraocular lens / without an intraocular lens / as a secondary procedure on my left / right eyeIt has been explained to me that during the course of operation/ procedure, unforeseen conditions may be revealed or encounteredwhich necessitate surgical or other procedures in addition to or different from those contemplated. I, therefore, further request andauthorize the above named Physician/Surgeon or his designates to perform such additional surgical or other procedures as he orthey deem necessary or desirable2. The nature and purpose of the operation, the necessity thereof, the possible alternative methods of treatment of my condition havebeen fully explained to me and I understand the same3. I am fully aware that the surgery is being performed in good faith and that no guarantee or assurance has been given as to the resultthat may be obtained4. I consent to the administration of anesthesia and to the use of such anesthetics as may be deemed necessary or desirable5. I further consent to the administration of such drugs or infusions deemed necessary in the judgement of the medical staff6. I consent to the observing, photographing or televising of the procedure to be performed for medical, scientific or educationpurpose provided my identity is not revealed by the pictures or by descriptive text accompanying them7. Any tissues or parts surgically removed may be disposed off by the institution in accordance with customary practiceInformed Consent for Operation on Patients With Guarded / Poor Visual PrognosisI have been explained by the attending surgeon/Designated Assistant prior to the operation that visual prognosis after surgery isguarded/uncertain/poor/very poor. The reasons for this have been explained to me. The reasons are: (to be signed by the patient /person authorised to consent for the patient.)Trauma / Diabetic Retinopathy / Myopia / Glaucoma / Uveitis /Age Related Macular Degeneration / PVR / Complex TractionRetinal Detachment/Combined tractional rhegmatogenous retinal detachment /Dislocated lens or IOL / Endophthalmitis (Severeeye infection)

Cataract Surgery With / Without Implantation of Intraocular Lens