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Biomedical subjects

M J Roper-Hall

Publications and source records attributed to M J Roper-Hall.

At least 37 records · Page 2Linked to original sources

Control of astigmatism after surgery and trauma.

Since the introduction of microsurgical accuracy in the closure of corneal wounds, there have been fewer complications due to imperfect wound closure. As a result the eye is much safer after intraocular surgery or trauma. There may, however, be an undesirable and irregular refractive error. Much thought has been given to the prevention of this by attention to other details during closure of wounds. Interest has been revived in surgery for the correction of inherent refractive errors. The methods used for such conditions may also be applied to residual distortion after surgery or trauma. The possibility of adjustment during the early postoperative period has escaped detailed consideration. This neglected approach to the control of astigmatism is discussed in this paper.

Astigmatism↗

Immediate management of iris and lens in perforations of the eye.

Once accurate corneo-scleral repair has become the rule, the management of associated iris and lens damage can be improved. Much more effective primary surgical repair has been established with the aim of preventing complications and the extra hazards of a difficult secondary procedure. Adequate examination of the injured eye is essential. Much may be obscured at the initial examination. There should be no hesitation in dilating the pupil as this will permit a more satisfactory assessment of the extent of damage behind the iris diaphragm. Before commencing surgery, it must be established whether the lens is damaged or not. Hypotony and fibrin on the lens surface can both cause an appearance suggestive of cataract. Lens surgery is needed at the primary repair only when the capsule is torn.

Corneal Injuries↗

Intraocular lenses with intracapsular cataract extraction.

Excellent results are obtainable with well-proved lenses. For those using intracapsular methods, I can give assurance that it is not necessary to change in order to use intraocular lenses safely. The prerequisites are an established safe technique for routine cataract surgery with good visual results. Proper wound closure should be demonstrated by an absence of cases of shallow or absent anterior chamber, of iris prolapse, or postoperative hyphaema. No intraocular lens of any kind should be used unless the quality of routine cataract surgery is high in these respects as well as in avoiding damage to the corneal endothelium. The choice of intraocular lens should be one which can be applied to the surgeon's well-established method and it should also be a well-established lens which has a safe long-term record.

Cataract Extraction↗

[Concise review of progress in the management of perforating injury (author's transl)].

Improvement in the management of perforating injuries has become possible since the successful control of infection. However, the decisive step ahead was accurate suturing. The use of finer needles and of thinner, standardised suture material enabled accurate adaption of the margins and closer suturing. The anterior chamber could now be filled with air, thus preventing contact between iris and cornea. Development of new instruments enabled simultaneous management of haemorrhages and of injuries of the lens and vitreous body. Prolapse of iris without essential damage to the iris could be reduced either by limbal puncture or by intensive rinsing with fluid, proceeding from the edges of the wound. Parallel to the successful management of lens injuries a more radical form of vitreous surgery developed without significantly increasing surgical trauma. In Birmingham, during 1950--1958 45% of the patients with perforating injury of the anterior segment--including injury of the lens or iris--achieved a visual acuity of 6/12 or better. During 1971--1974 the corresponding percentage was 62% at the same clinic.

Eye Injuries↗

Traumatic cataract.

In many cases of trauma it is presence of cataract which denies the patient a good final visual result. Cataract may be caused by blunt or perforating injury. Intraocular foreign bodies may be held within the lens or pass through it. Lens opacities may also be caused by chemical burns and remote forces such as electrical current and radiational injury. Frequently the cataract is unilateral, causing considerable impairment of vision of one eye while the function of the other eye is normal and expected to remain so. The aim of surgery must be to remove all lens protein from the pupillary area and as far as possible from behind the iris.

Cataract↗