**Acknowledgements**

To God for having helped the first author, in troubles during many years of suffering that led him to become an analytical observer of events in his own body, because of his mother, under the doctor's permission, 15 days before the birth of the first author, traveled by plane. In addition, by helping us to live, long ago, with the hardships as a result of internal political and economic decisions. For Marcos, first and third authors' brother, who saw in 1999 in a self-help book the importance of oculomotor muscle relaxation for eyesight treatment. To colleagues of the first author ANDES-SN Sindicato Nacional members and its Seção Sindical ADUFEPE members who during the intervals of same these organizations' meetings, provided important scientific information for the study. To those who were interviewed, friends, colleagues and family members who directly or indirectly have contributed to this work. To the engineer Florisnaldo Hermínio da Fonseca for the financial help in publishing this chapter. The authors agree with the individual mentions.

**87**

**Author details**

Humberto Dória Silva1

Maria Tamires Dória Silva3

\*, Rostan Silvestre da Silva<sup>2</sup>

4 Independent Professional in Biology and Mathematics, Recife, Brazil

5 Independent Professional in Production Engineering and Mathematics, Recife, Brazil

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

1 Federal University of Pernambuco - UFPE, Recife, Brazil

3 Independent Professional in Physiotherapy, Recife, Brazil

\*Address all correspondence to: hdorias@gmail.com

2 Independent Professional, Maceió, Brazil

provided the original work is properly cited.

, Cristiana Pereira Dória4

, Eduardo Dória Silva1

and Cristiane Pereira Dória5

,

*Visual Impairment Caused by Monovision Surgical Design*

*DOI: http://dx.doi.org/10.5772/intechopen.95770*

*Visual Impairment Caused by Monovision Surgical Design DOI: http://dx.doi.org/10.5772/intechopen.95770*

*Current Cataract Surgical Techniques*

great visual discomforts.

any scientific basis?

**Acknowledgements**

After monofocal surgery, the patient cannot, without the use of corrective lenses, drive her vehicle or walk on the street safely [19, 20], in addition to losing the image fusion, blurred image [20] and, consequently, exposing herself to macular degeneration [15, 16], the increase in intraocular pressure (glaucoma) [2, 5, 10, 12] and, with corrective lenses, the 69-year-old patient suffers discomfort for read and headaches, today she prefers to abstain of read because of the

Monovision surgery and bilateral monofocus surgery do not interfere in the surgeon's fees or in the surgical costs of the clinic or health plan, in addition to not interfering in the values negotiated by the implanted lenses, so monovision surgery does not bring any financial advantage and can bring unrecoverable damage to the patient, why, in secret for the patient, use monovision surgery without

To God for having helped the first author, in troubles during many years of suffering that led him to become an analytical observer of events in his own body, because of his mother, under the doctor's permission, 15 days before the birth of the first author, traveled by plane. In addition, by helping us to live, long ago, with the hardships as a result of internal political and economic decisions. For Marcos, first and third authors' brother, who saw in 1999 in a self-help book the importance of oculomotor muscle relaxation for eyesight treatment. To colleagues of the first author ANDES-SN Sindicato Nacional members and its Seção Sindical ADUFEPE members who during the intervals of same these organizations' meetings, provided important scientific information for the study. To those who were interviewed, friends, colleagues and family members who directly or indirectly have contributed to this work. To the engineer Florisnaldo Hermínio da Fonseca for the financial help

in publishing this chapter. The authors agree with the individual mentions.

**86**
